Update openstack.yaml

Added marker relationships so the REST and GUI report full topology graph
CFY-121 add relationship between server and floating ip
CFY-121 temp change during dev
CFY-121 some modifications
Merge branch 'develop' into feature/CFY-121-server-floating-ip
CFY-121 added status rest call
Merge branch 'develop' into feature/CFY-121-server-floating-ip
CFY-417 added error handler for 500 internal server errors
CFY-417 fixed a description message of the deployment's executions call's statuses parameter
CFY-417 fixed 500 internal server error bug when user tries to execute a workflow which doesn't exist in deployment
CFY-417 fixed 500 error message; it'll now be of correct format and also include the stack trace.
CFY-417 fix flake8 error
CFY-416 now throwing error on /nodes/<id> call for nonexisting node ids; now checking for node's runtime_info before checking for state, so if node doesn't exist it'll throw the exception earlier without going to riemann. Note: if /nodes/id is called without querying for runtime_info, an exception won't be thrown for nonexisting nodes, and possibly an empty state will be returned if it was queried for.
CFY-416 fixed failing get_node test; added a test for getting a nonexistant node
CFY-417 added a test for executing nonexisting workflow id
Merge pull request #193 from CloudifySource/feature/CFY-416-raise-exception-on-nodes-id-call-when-node-doesnt-exist

CFY-416 now throwing error on /nodes/<id> call for nonexisting node ids;...
Merge branch 'develop' into feature/CFY-417-clear-error-message-for-internal-server-errors-in-manager-rest-server
CFY-417 fixed error code for nonexisting workflow to 400 from 404 (since it's not a resource in the REST sense); fixed internal server error 500 message including stacktrace
CFY-417 fixed exception name
Merge branch 'develop' into feature/CFY-121-server-floating-ip