As a part of the Neutron ECMP support being added in the PLUMgrid plugin,
the new CLI for PGLib requires a configuration file pgrc
which is installed under /etc/neutron/plugins/plumgrid
Change-Id: I8a492655ff53099057e4648c9c835cd7ae4d0d2a
Signed-off-by: Javeria Khan <javeriak@plumgrid.com>