CFY-1165 added server_traceback attrbiute to CloudifyClientError
CFY-1165 fix flake
Merge pull request #36 from cloudify-cosmo/feature/CFY-1165-add-server-traceback

CFY-1165 added server_traceback attrbiute to CloudifyClientError
Merge branch 'master' into CFY-1123-tosca-inputs

Conflicts:
	cloudify_rest_client/client.py
	cloudify_rest_client/exceptions.py