Remove Nova EC2 deployment

Remove Nova EC2 deployment

Nova EC2 does not exist anymore since Mitaka, parameters are already
deprecated in Mitaka and send warnings to the Puppet catalog.
The service has been replaced by ec2api project, where Puppet OpenStack
team is currently writting a module.

In the meantime we add support in TripleO, this patch removes all
occurences of Nova EC2 configuration, which are useless and send
warnings for nothing.

Change-Id: Ief2d0e5c77b5ac58560606fee930fbd66c40ffc3