Description of problem:
When deploy a 65 node cloud, there are not enough open file descriptors configured for rabbitmq. As a result not all of the services in the overcloud can get rabbitmq connections and the deployment fails in various ways as service fail to start.

This should work out of the box

Version-Release number of selected component (if applicable):


How reproducible:
Everytime

Steps to Reproduce:
1.Use the default configuration
2.Try to deploy a 65 node cloud
3.

Actual results:
Deployment fails

Expected results:
It should succeed

Additional info: