VOL-1643 Update voltha-lib-go to use voltha-protos v3.0.0

and bump up the version to 3.0.0. voltha-protos is modified to be
compatible with the java language proto compilation. It's a major
change and a major version change has been made.

Change-Id: Ifb93430567ddf96aaa0fbf6e5853aad9e1070f6f
diff --git a/pkg/adapters/adapterif/core_proxy_if.go b/pkg/adapters/adapterif/core_proxy_if.go
index c7af374..dbf3418 100644
--- a/pkg/adapters/adapterif/core_proxy_if.go
+++ b/pkg/adapters/adapterif/core_proxy_if.go
@@ -19,7 +19,7 @@
 import (
 	"context"
 
-	"github.com/opencord/voltha-protos/v2/go/voltha"
+	"github.com/opencord/voltha-protos/v3/go/voltha"
 )
 
 // CoreProxy interface for voltha-go coreproxy.
@@ -32,10 +32,10 @@
 	RegisterAdapter(ctx context.Context, adapter *voltha.Adapter, deviceTypes *voltha.DeviceTypes) error
 	DeviceUpdate(ctx context.Context, device *voltha.Device) error
 	PortCreated(ctx context.Context, deviceID string, port *voltha.Port) error
-	PortsStateUpdate(ctx context.Context, deviceID string, operStatus voltha.OperStatus_OperStatus) error
+	PortsStateUpdate(ctx context.Context, deviceID string, operStatus voltha.OperStatus_Types) error
 	DeleteAllPorts(ctx context.Context, deviceID string) error
 	DeviceStateUpdate(ctx context.Context, deviceID string,
-		connStatus voltha.ConnectStatus_ConnectStatus, operStatus voltha.OperStatus_OperStatus) error
+		connStatus voltha.ConnectStatus_Types, operStatus voltha.OperStatus_Types) error
 
 	DevicePMConfigUpdate(ctx context.Context, pmConfigs *voltha.PmConfigs) error
 	ChildDeviceDetected(ctx context.Context, parentDeviceID string, parentPortNo int,
@@ -49,5 +49,5 @@
 	SendPacketIn(ctx context.Context, deviceID string, port uint32, pktPayload []byte) error
 	DeviceReasonUpdate(ctx context.Context, deviceID string, deviceReason string) error
 	PortStateUpdate(ctx context.Context, deviceID string, pType voltha.Port_PortType, portNo uint32,
-		operStatus voltha.OperStatus_OperStatus) error
+		operStatus voltha.OperStatus_Types) error
 }