rackspace-monitoring-agent service restart fails in containers

Created by: byronmccollum

The change introduced in PR #572 ensures handlers are flushed, and thus rackspace-monitoring-agent is restarted. Previously, the agent restarts were delegated to the physical host for containers, as the agent is only installed on the physical hosts. This critical piece is missing, so agent restarts lead to the playbooks failing.

TASK: [rpc_maas | Restart rackspace-monitoring-agent service] ***************** 
changed: [5d551fe2-compute1]
changed: [5d551fe2-infra1]
changed: [5d551fe2-logger1]
changed: [5d551fe2-block1]
changed: [5d551fe2-object1]
failed: [5d551fe2-infra1_nova_cert_container-6e52f1f6] => {"failed": true}
msg: no service or tool found for: rackspace-monitoring-agent
failed: [5d551fe2-infra1_galera_container-2aee94aa] => {"failed": true}
msg: no service or tool found for: rackspace-monitoring-agent
failed: [5d551fe2-infra1_glance_container-46b0a4f4] => {"failed": true}
msg: no service or tool found for: rackspace-monitoring-agent
failed: [5d551fe2-infra1_galera_container-3eee7389] => {"failed": true}
msg: no service or tool found for: rackspace-monitoring-agent
failed: [5d551fe2-infra1_neutron_agents_container-a8007a22] => {"failed": true}
msg: no service or tool found for: rackspace-monitoring-agent
failed: [5d551fe2-infra1_rabbit_mq_container-579777da] => {"failed": true}
msg: no service or tool found for: rackspace-monitoring-agent
failed: [5d551fe2-infra1_cinder_scheduler_container-6cdcc1a7] => {"failed": true}
msg: no service or tool found for: rackspace-monitoring-agent
failed: [5d551fe2-infra1_nova_api_metadata_container-0afa7103] => {"failed": true}
msg: no service or tool found for: rackspace-monitoring-agent
failed: [5d551fe2-infra1_rabbit_mq_container-b8942266] => {"failed": true}
msg: no service or tool found for: rackspace-monitoring-agent
failed: [5d551fe2-infra1_keystone_container-e2b0fd59] => {"failed": true}
msg: no service or tool found for: rackspace-monitoring-agent
failed: [5d551fe2-infra1_nova_console_container-3031e036] => {"failed": true}
msg: no service or tool found for: rackspace-monitoring-agent
failed: [5d551fe2-infra1_memcached_container-3ceef055] => {"failed": true}
msg: no service or tool found for: rackspace-monitoring-agent
failed: [5d551fe2-infra1_nova_scheduler_container-33b8cedf] => {"failed": true}
msg: no service or tool found for: rackspace-monitoring-agent
failed: [5d551fe2-infra1_nova_api_os_compute_container-fa0608ae] => {"failed": true}
msg: no service or tool found for: rackspace-monitoring-agent
failed: [5d551fe2-infra1_rabbit_mq_container-4c8cd600] => {"failed": true}
msg: no service or tool found for: rackspace-monitoring-agent
failed: [5d551fe2-infra1_heat_engine_container-8dcc1e57] => {"failed": true}
msg: no service or tool found for: rackspace-monitoring-agent
failed: [5d551fe2-infra1_utility_container-ef61a275] => {"failed": true}
msg: no service or tool found for: rackspace-monitoring-agent
failed: [5d551fe2-infra1_neutron_server_container-134435a6] => {"failed": true}
msg: no service or tool found for: rackspace-monitoring-agent
failed: [5d551fe2-infra1_nova_conductor_container-320a04a8] => {"failed": true}
msg: no service or tool found for: rackspace-monitoring-agent
failed: [5d551fe2-logger1_elasticsearch_container-18eb911f] => {"failed": true}
msg: no service or tool found for: rackspace-monitoring-agent
failed: [5d551fe2-infra1_swift_proxy_container-dcdf6a6e] => {"failed": true}
msg: no service or tool found for: rackspace-monitoring-agent
failed: [5d551fe2-infra1_cinder_api_container-ff64047c] => {"failed": true}
msg: no service or tool found for: rackspace-monitoring-agent
failed: [5d551fe2-logger1_logstash_container-8a6f4648] => {"failed": true}
msg: no service or tool found for: rackspace-monitoring-agent
failed: [5d551fe2-infra1_horizon_container-756d77de] => {"failed": true}
msg: no service or tool found for: rackspace-monitoring-agent
failed: [5d551fe2-infra1_galera_container-145e0889] => {"failed": true}
msg: no service or tool found for: rackspace-monitoring-agent
failed: [5d551fe2-logger1_kibana_container-95912198] => {"failed": true}
msg: no service or tool found for: rackspace-monitoring-agent
failed: [5d551fe2-infra1_repo_container-edc74fa2] => {"failed": true}
msg: no service or tool found for: rackspace-monitoring-agent
failed: [5d551fe2-infra1_heat_apis_container-caadbfbd] => {"failed": true}
msg: no service or tool found for: rackspace-monitoring-agent
failed: [5d551fe2-logger1_rsyslog_container-f8c4d90a] => {"failed": true}
msg: no service or tool found for: rackspace-monitoring-agent