Adds rsyslog-install.yml in to the gate scripts.
Adds rsyslog-install.yml in to the gate scripts.

The rsyslog-install.yml play was not being run within run-playbooks.sh
script. The change makes it so that the AIO will now have the ability
to test the rsyslog server roles.

Change-Id: I30ea36ad4fb6696aeedf76351e18e09cf5e50a1e
Closes-Bug: 1446275
(cherry picked from commit eccc83bff8895b1efbeb0ec5dc426abdd2f6e434)

yanyao/openstack-deployment,VaneCloud/openstack-ansible,yanyao/openstack-deployment,VaneCloud/openstack-ansible,yanyao/openstack-deployment,VaneCloud/openstack-ansible,yanyao/openstack-deployment