Implemented AbstractApplication.doStop() following pattern of AbstractApplication.doStart()
bump to jclouds-1.7.2-ea-brooklyn.3
Merge pull request #1273 from andreaturli/jclouds-1.7.2-ea-brooklyn.3

bump to jclouds-1.7.2-ea-brooklyn.3
Merge pull request #1272 from Nakomis/fix/abstract-application-dostop

Implemented AbstractApplication.doStop()