CFY-1431 added validation interface to base type; added execute_operation workflow
CFY-1431 fixed unit test
CFY-1431 fixed unit test
CFY-1431 fixed unit test
Merge branch 'master' into CFY-1431-add-bootstrap-and-teardown-validations-to-openstack-plugin
CFY-1431 fixed refactor bug
CFY-1431 fixed test
CFY-1431 small fix to parameters
Merge pull request #143 from cloudify-cosmo/CFY-1431-add-bootstrap-and-teardown-validations-to-openstack-plugin

CFY 1431 add bootstrap and teardown validations to openstack plugin