Remove invoker tracking/publishing per-subject activation counts. (#1430)

* Remove tracking per-subject activation count on invoker and stop consul publishing.

* Extend invoker count deletion to invoker-wide count.
diff --git a/tests/src/whisk/core/controller/test/ControllerTestCommon.scala b/tests/src/whisk/core/controller/test/ControllerTestCommon.scala
index e886598..8c76838 100644
--- a/tests/src/whisk/core/controller/test/ControllerTestCommon.scala
+++ b/tests/src/whisk/core/controller/test/ControllerTestCommon.scala
@@ -164,8 +164,6 @@
     // unit tests that need an activation via active ack/fast path should set this to value expected
     var whiskActivationStub: Option[WhiskActivation] = None
 
-    override def getIssuedUserActivationCounts: Map[String, Long] = Map()
-
     override def getActiveUserActivationCounts: Map[String, Long] = Map()
 
     override def publish(msg: ActivationMessage, timeout: FiniteDuration)(implicit transid: TransactionId): (Future[Unit], Future[WhiskActivation]) =