Update docker.service to work with 1.12.0

[manics]

The upstream docker service file has changed with 1.12 (no longer using a separate service for the socket)

Also makes role: system-monitor-agent part of the standard install for all idr servers idrsystems-playbooks/idr-initial.yml instead of for individual groups.

[atarkowska]

tested today with new vm

$ source ~/OMERO/VENV/ansible/bin/activate
(ansible) $ ansible-playbook -i infrastructure/ansible/inventory/openstack.py -l ola-mapr -vv -u centos infrastructure/openstack/examples/omedev-docker.yml
(ansible) $ ansible-playbook -i infrastructure/ansible/inventory/openstack.py -l ola-mapr -vv -u centos infrastructure/openstack/examples/devspace.yml

https://github.com/aleksandra-tarkowska/infrastructure/blob/devspace/openstack/examples/omedev-docker.yml
https://github.com/aleksandra-tarkowska/infrastructure/blob/devspace/openstack/examples/devspace.yml

withouth this PR I got:

TASK [docker : docker | enable] ************************************************
task path: /Users/ola/OMERO/DOCKER/infrastructure/ansible/roles/docker/tasks/main.yml:55
fatal: [61fa3b27-5bb4-456c-b44c-2e826edcee6e]: FAILED! => {"changed": false, "failed": true, "msg": "Failed to start docker.service: Unit docker.socket failed to load: No such file or directory.\n"}

brand new 133 is back to life now

[kennethgillen]

👍 thanks for the testing note @aleksandra-tarkowska