Fix dependencies for task-based deployment
Fix dependencies for task-based deployment

The post-deployment tasks need to wait for the collectors to be
installed on all the nodes.

Change-Id: I3f3974a2b3bc01081a02653bbc3c5e00c82e4b41

stackforge/fuel-plugin-lma-infrastructure-alerting,stackforge/fuel-plugin-lma-infrastructure-alerting,stackforge/fuel-plugin-lma-infrastructure-alerting