Creates keystonerc_admin for user

- creates keystonerc_admin for user running Packstack
in case OpenStack client host is the host where packstack
is running (eg. all-in-one installation)

Change-Id: I37be40de46f54c78c934a27bc3f5e3c9381e7f19
Fixes: rhbz#964005, rhbz#976394
Merge "Creates keystonerc_admin for user"