CFY-907 wait for agent to actually start before returning from start and restart
CFY-907 add extra call to verify_no_celery_error right before we raise the failure error to make sure we don't lose any important information for the cause of the failure
CFY-907 improve error message to display how much time we waited for the agent to start before giving up
Merge pull request #75 from cloudify-cosmo/feature/CFY-907-wait-for-agent

Wait for agent to start