Merge pull request #6 from plumgrid/salmankh-automaton-dev

/root/openrc not required as /root/keystonerc_admin already created for ...
Foreman picks pg_enable_metadata as string if provided through params.pp and runs in error if override as boolean.
So it skips passing through params.pp.

Signed-off-by: salmank <salmank@plumgrid.com>