[VOL-1386]  This commit add "dep" as the package management tool
for voltha-go.

Change-Id: I52bc4911dd00a441756ec7c30f46d45091f3f90e
diff --git a/vendor/github.com/hashicorp/consul/api/health.go b/vendor/github.com/hashicorp/consul/api/health.go
new file mode 100644
index 0000000..eae6a01
--- /dev/null
+++ b/vendor/github.com/hashicorp/consul/api/health.go
@@ -0,0 +1,250 @@
+package api
+
+import (
+	"fmt"
+	"strings"
+)
+
+const (
+	// HealthAny is special, and is used as a wild card,
+	// not as a specific state.
+	HealthAny      = "any"
+	HealthPassing  = "passing"
+	HealthWarning  = "warning"
+	HealthCritical = "critical"
+	HealthMaint    = "maintenance"
+)
+
+const (
+	// NodeMaint is the special key set by a node in maintenance mode.
+	NodeMaint = "_node_maintenance"
+
+	// ServiceMaintPrefix is the prefix for a service in maintenance mode.
+	ServiceMaintPrefix = "_service_maintenance:"
+)
+
+// HealthCheck is used to represent a single check
+type HealthCheck struct {
+	Node        string
+	CheckID     string
+	Name        string
+	Status      string
+	Notes       string
+	Output      string
+	ServiceID   string
+	ServiceName string
+	ServiceTags []string
+
+	Definition HealthCheckDefinition
+}
+
+// HealthCheckDefinition is used to store the details about
+// a health check's execution.
+type HealthCheckDefinition struct {
+	HTTP                           string
+	Header                         map[string][]string
+	Method                         string
+	TLSSkipVerify                  bool
+	TCP                            string
+	Interval                       ReadableDuration
+	Timeout                        ReadableDuration
+	DeregisterCriticalServiceAfter ReadableDuration
+}
+
+// HealthChecks is a collection of HealthCheck structs.
+type HealthChecks []*HealthCheck
+
+// AggregatedStatus returns the "best" status for the list of health checks.
+// Because a given entry may have many service and node-level health checks
+// attached, this function determines the best representative of the status as
+// as single string using the following heuristic:
+//
+//  maintenance > critical > warning > passing
+//
+func (c HealthChecks) AggregatedStatus() string {
+	var passing, warning, critical, maintenance bool
+	for _, check := range c {
+		id := string(check.CheckID)
+		if id == NodeMaint || strings.HasPrefix(id, ServiceMaintPrefix) {
+			maintenance = true
+			continue
+		}
+
+		switch check.Status {
+		case HealthPassing:
+			passing = true
+		case HealthWarning:
+			warning = true
+		case HealthCritical:
+			critical = true
+		default:
+			return ""
+		}
+	}
+
+	switch {
+	case maintenance:
+		return HealthMaint
+	case critical:
+		return HealthCritical
+	case warning:
+		return HealthWarning
+	case passing:
+		return HealthPassing
+	default:
+		return HealthPassing
+	}
+}
+
+// ServiceEntry is used for the health service endpoint
+type ServiceEntry struct {
+	Node    *Node
+	Service *AgentService
+	Checks  HealthChecks
+}
+
+// Health can be used to query the Health endpoints
+type Health struct {
+	c *Client
+}
+
+// Health returns a handle to the health endpoints
+func (c *Client) Health() *Health {
+	return &Health{c}
+}
+
+// Node is used to query for checks belonging to a given node
+func (h *Health) Node(node string, q *QueryOptions) (HealthChecks, *QueryMeta, error) {
+	r := h.c.newRequest("GET", "/v1/health/node/"+node)
+	r.setQueryOptions(q)
+	rtt, resp, err := requireOK(h.c.doRequest(r))
+	if err != nil {
+		return nil, nil, err
+	}
+	defer resp.Body.Close()
+
+	qm := &QueryMeta{}
+	parseQueryMeta(resp, qm)
+	qm.RequestTime = rtt
+
+	var out HealthChecks
+	if err := decodeBody(resp, &out); err != nil {
+		return nil, nil, err
+	}
+	return out, qm, nil
+}
+
+// Checks is used to return the checks associated with a service
+func (h *Health) Checks(service string, q *QueryOptions) (HealthChecks, *QueryMeta, error) {
+	r := h.c.newRequest("GET", "/v1/health/checks/"+service)
+	r.setQueryOptions(q)
+	rtt, resp, err := requireOK(h.c.doRequest(r))
+	if err != nil {
+		return nil, nil, err
+	}
+	defer resp.Body.Close()
+
+	qm := &QueryMeta{}
+	parseQueryMeta(resp, qm)
+	qm.RequestTime = rtt
+
+	var out HealthChecks
+	if err := decodeBody(resp, &out); err != nil {
+		return nil, nil, err
+	}
+	return out, qm, nil
+}
+
+// Service is used to query health information along with service info
+// for a given service. It can optionally do server-side filtering on a tag
+// or nodes with passing health checks only.
+func (h *Health) Service(service, tag string, passingOnly bool, q *QueryOptions) ([]*ServiceEntry, *QueryMeta, error) {
+	var tags []string
+	if tag != "" {
+		tags = []string{tag}
+	}
+	return h.service(service, tags, passingOnly, q, false)
+}
+
+func (h *Health) ServiceMultipleTags(service string, tags []string, passingOnly bool, q *QueryOptions) ([]*ServiceEntry, *QueryMeta, error) {
+	return h.service(service, tags, passingOnly, q, false)
+}
+
+// Connect is equivalent to Service except that it will only return services
+// which are Connect-enabled and will returns the connection address for Connect
+// client's to use which may be a proxy in front of the named service. If
+// passingOnly is true only instances where both the service and any proxy are
+// healthy will be returned.
+func (h *Health) Connect(service, tag string, passingOnly bool, q *QueryOptions) ([]*ServiceEntry, *QueryMeta, error) {
+	var tags []string
+	if tag != "" {
+		tags = []string{tag}
+	}
+	return h.service(service, tags, passingOnly, q, true)
+}
+
+func (h *Health) ConnectMultipleTags(service string, tags []string, passingOnly bool, q *QueryOptions) ([]*ServiceEntry, *QueryMeta, error) {
+	return h.service(service, tags, passingOnly, q, true)
+}
+
+func (h *Health) service(service string, tags []string, passingOnly bool, q *QueryOptions, connect bool) ([]*ServiceEntry, *QueryMeta, error) {
+	path := "/v1/health/service/" + service
+	if connect {
+		path = "/v1/health/connect/" + service
+	}
+	r := h.c.newRequest("GET", path)
+	r.setQueryOptions(q)
+	if len(tags) > 0 {
+		for _, tag := range tags {
+			r.params.Add("tag", tag)
+		}
+	}
+	if passingOnly {
+		r.params.Set(HealthPassing, "1")
+	}
+	rtt, resp, err := requireOK(h.c.doRequest(r))
+	if err != nil {
+		return nil, nil, err
+	}
+	defer resp.Body.Close()
+
+	qm := &QueryMeta{}
+	parseQueryMeta(resp, qm)
+	qm.RequestTime = rtt
+
+	var out []*ServiceEntry
+	if err := decodeBody(resp, &out); err != nil {
+		return nil, nil, err
+	}
+	return out, qm, nil
+}
+
+// State is used to retrieve all the checks in a given state.
+// The wildcard "any" state can also be used for all checks.
+func (h *Health) State(state string, q *QueryOptions) (HealthChecks, *QueryMeta, error) {
+	switch state {
+	case HealthAny:
+	case HealthWarning:
+	case HealthCritical:
+	case HealthPassing:
+	default:
+		return nil, nil, fmt.Errorf("Unsupported state: %v", state)
+	}
+	r := h.c.newRequest("GET", "/v1/health/state/"+state)
+	r.setQueryOptions(q)
+	rtt, resp, err := requireOK(h.c.doRequest(r))
+	if err != nil {
+		return nil, nil, err
+	}
+	defer resp.Body.Close()
+
+	qm := &QueryMeta{}
+	parseQueryMeta(resp, qm)
+	qm.RequestTime = rtt
+
+	var out HealthChecks
+	if err := decodeBody(resp, &out); err != nil {
+		return nil, nil, err
+	}
+	return out, qm, nil
+}