Get node IPs and IDs according to env

Get node IPs and IDs according to env

Extract node IPs and IDs for each node having a controller or compute
role (name starting with the "cmp" or "ctl" prefix) and add them into
the $pod_yaml file, analogous to the previous implementation.
Since node IDs are expected to be unique and integers (condition that
does not match the salt node ID format), they are substituted with an
incremented index for each controller/compute node in the environment.

Change-Id: Id90626edc3f098bd96343336b2be179721dee5a1
Signed-off-by: Catalina Focsa <catalina.focsa@enea.com>