VOL-1855: Support for techprofile

Also now use voltha-protos repo similar to other 2.x builds
Also a go fmt

Tested with:
voltha-go TP patch: https://gerrit.opencord.org/#/c/14767/
openolt TP patch: https://gerrit.opencord.org/#/c/14771/

Change-Id: I327573af6cd7f54cdfcb9fb4bdbdc24d960f96be
diff --git a/go.mod b/go.mod
index ad2890c..256b8fe 100644
--- a/go.mod
+++ b/go.mod
@@ -9,6 +9,7 @@
 	github.com/google/gopacket v1.1.17
 	github.com/grpc-ecosystem/grpc-gateway v1.9.5
 	github.com/opencord/omci-sim v0.0.0-20190717165025-5ff7bb17f1e9
+	github.com/opencord/voltha-protos v0.0.0-20190802214823-9eceb0155700
 	github.com/sirupsen/logrus v1.4.2
 	golang.org/x/net v0.0.0-20190724013045-ca1201d0de80
 	golang.org/x/sync v0.0.0-20190423024810-112230192c58