CFY-1850 add support for running external tests
CFY-1850 add support for running external tests

codilime/cloudify-system-tests,isaac-s/cloudify-system-tests,codilime/cloudify-system-tests,cloudify-cosmo/cloudify-system-tests,codilime/cloudify-system-tests,isaac-s/cloudify-system-tests,cloudify-cosmo/cloudify-system-tests,isaac-s/cloudify-system-tests