PLT-4357 adding performance monitoring (#4622)

* WIP

* WIP

* Adding metrics collection

* updating vendor packages

* Adding metrics to config

* Adding admin console page for perf monitoring

* Updating glide

* switching to tylerb/graceful

Makefile

@@ -208,6 +208,7 @@ ifeq ($(BUILD_ENTERPRISE_READY),true)
 	$(GO) test $(GOFLAGS) -run=$(TESTS) -covermode=count -c ./enterprise/emoji && ./emoji.test -test.v -test.timeout=120s -test.coverprofile=cemoji.out || exit 1
 	$(GO) test $(GOFLAGS) -run=$(TESTS) -covermode=count -c ./enterprise/saml && ./saml.test -test.v -test.timeout=60s -test.coverprofile=csaml.out || exit 1
 	$(GO) test $(GOFLAGS) -run=$(TESTS) -covermode=count -c ./enterprise/cluster && ./cluster.test -test.v -test.timeout=60s -test.coverprofile=ccluster.out || exit 1
+	$(GO) test $(GOFLAGS) -run=$(TESTS) -covermode=count -c ./enterprise/metrics && ./metrics.test -test.v -test.timeout=60s -test.coverprofile=cmetrics.out || exit 1
 	$(GO) test $(GOFLAGS) -run=$(TESTS) -covermode=count -c ./enterprise/account_migration && ./account_migration.test -test.v -test.timeout=60s -test.coverprofile=caccount_migration.out || exit 1
 
 	tail -n +2 cldap.out >> ecover.out
@@ -216,14 +217,16 @@ ifeq ($(BUILD_ENTERPRISE_READY),true)
 	tail -n +2 cemoji.out >> ecover.out
 	tail -n +2 csaml.out >> ecover.out
 	tail -n +2 ccluster.out >> ecover.out
-	tail -n +2 caccount_migration.out >> ecover.out
-	rm -f cldap.out ccompliance.out cmfa.out cemoji.out csaml.out ccluster.out caccount_migration.out
+	tail -n +2 cmetrics.out >> ecover.out
+	tail -n +2 caccount_migration.out >> ecover.out	
+	rm -f cldap.out ccompliance.out cmfa.out cemoji.out csaml.out ccluster.out cmetrics.out caccount_migration.out
 	rm -r ldap.test
 	rm -r compliance.test
 	rm -r mfa.test
 	rm -r emoji.test
 	rm -r saml.test
 	rm -r cluster.test
+	rm -r metrics.test
 	rm -r account_migration.test
 	rm -f config/*.crt
 	rm -f config/*.key