CFY-1127 add test that re-installs deployment on openstack provider
Fixed hello-world example URL
CFY-1124 modified runtime property names of openstack plugin nodes
CFY-1159 added security_group_rule to neutron_galore system test; also added cleanup for security group rules in openstack handler in the system tests environment
CFY-1159 fixed bug in test
CFY-1159 reverted openstack.py back to being without security group rules cleanup - those will clean up automatically when security groups clean up. it was a problem to keep them in because they have no openstack name and it interferes with running multiple tests in parallel
CFY-1159 flake8 fix
Merge pull request #39 from cloudify-cosmo/CFY-1124-openstack-plugin-atomicity-and-cleanup

CFY 1124 openstack plugin atomicity and cleanup
CFY-1127 merge with master
CFY-1127 refactorings; also fixed a bug from merge commit
Merge pull request #37 from cloudify-cosmo/CFY-1127-reinstall-blueprint-test

CFY-1127 add test that re-installs deployment on openstack provider
Merge branch 'master' into CFY-1129-test-uninstall-after-install-failure