
Automatic merge from submit-queue Added e2e framweork and a simple test for HA master. Added e2e framweork for testing HA master. Added one simple e2e test for HA master that first grows and then shrinks GCE cluster.
Automatic merge from submit-queue Added e2e framweork and a simple test for HA master. Added e2e framweork for testing HA master. Added one simple e2e test for HA master that first grows and then shrinks GCE cluster.