cord-776 create build / runtime containers for autmation uservices

Change-Id: I246973192adef56a250ffe93a5f65fff488840c1
diff --git a/automation/vendor/github.com/juju/gomaasapi/urlparams.go b/automation/vendor/github.com/juju/gomaasapi/urlparams.go
new file mode 100644
index 0000000..a6bab6e
--- /dev/null
+++ b/automation/vendor/github.com/juju/gomaasapi/urlparams.go
@@ -0,0 +1,48 @@
+// Copyright 2016 Canonical Ltd.
+// Licensed under the LGPLv3, see LICENCE file for details.
+
+package gomaasapi
+
+import (
+	"fmt"
+	"net/url"
+)
+
+// URLParams wraps url.Values to easily add values, but skipping empty ones.
+type URLParams struct {
+	Values url.Values
+}
+
+// NewURLParams allocates a new URLParams type.
+func NewURLParams() *URLParams {
+	return &URLParams{Values: make(url.Values)}
+}
+
+// MaybeAdd adds the (name, value) pair iff value is not empty.
+func (p *URLParams) MaybeAdd(name, value string) {
+	if value != "" {
+		p.Values.Add(name, value)
+	}
+}
+
+// MaybeAddInt adds the (name, value) pair iff value is not zero.
+func (p *URLParams) MaybeAddInt(name string, value int) {
+	if value != 0 {
+		p.Values.Add(name, fmt.Sprint(value))
+	}
+}
+
+// MaybeAddBool adds the (name, value) pair iff value is true.
+func (p *URLParams) MaybeAddBool(name string, value bool) {
+	if value {
+		p.Values.Add(name, fmt.Sprint(value))
+	}
+}
+
+// MaybeAddMany adds the (name, value) for each value in values iff
+// value is not empty.
+func (p *URLParams) MaybeAddMany(name string, values []string) {
+	for _, value := range values {
+		p.MaybeAdd(name, value)
+	}
+}