Using run_process instead of screen_it
Using run_process instead of screen_it

Using the old screen_it solum service can not managed by
systemd, so use run_process instead of screen_it

Change-Id: If4fa7c6f3139d9338cc1b01cc3130980f575d2f5

openstack/solum,stackforge/solum,stackforge/solum,openstack/solum