Added test to verify last when multiple listeners are present sharing
same IP, the last one deleted releases the IP
Removed unuded imports
REMOVED GCE specific tests.
* createVLANFirewallAndAddAndRemoveIcmpRule
* verifyDuplicateRejection
* removed a stray println
Merge pull request #124 from unwin/develop+CORE-RELEASE-TEST

Develop+core release test