modified testenv's elasticsearch startup to use sys.executable rather than whichever 'python' interpreter is the default in the PATH
Merge pull request #167 from CloudifySource/feature/CLOUDIFY-2393-Storage-Impl-Phase-2

modified testenv's elasticsearch startup to use sys.executable rather th...
Merge branch 'develop' into feature/CLOUDIFY-2544-terminate-workflow
CLOUDIFY-2544 implement initial cancel execution rest api in manager rest