Support Ops Agent 2.0.0

[jsirianni]

• Changed how service names are handled
  • A fact is used to set service_name, based on the service name variables in vars/
  • Renamed ops_agent_service_name to ops-agent_service_name, Ansible complains about naming convention when referencing the variable while setting a fact or during condition evaluation.
  • The new ops agent does not have .target as a suffix for its service name, this is handled conditionally depending on if major version 1 or not.
• Updated ops-agent_validation_cmd to target fluentbit as collectd has been replaced

Tested on Linux against ops agent 1.0.4 and 2.0.0 and 2.0.1. (note that 2.0.0 will fail its service test case, see this PR for the solution)

molecule create -s ops-agent-test
molecule cleanup -s ops-agent-test 
molecule converge -s ops-agent-test
molecule idempotence -s ops-agent-test 
molecule verify -s ops-agent-test

I do not like the redundant use of the "Service Name" fact, however, it was tricky to get conditional variable naming to work wirth the ops agent, which has two options (google-ops-agent and google-ops-agent.target).

I have not tested the following as my CI environment will not support them

• Windows
• new ops-agent_validation_cmd command, which validates the ops agent config instead of the sub agent config

Resolves https://github.com/GoogleCloudPlatform/google-cloud-ops-agents-ansible/issues/64

[rmoriar1]

Suse 15 tests are failing will the error fatal: [ansible-sles-15-monitoring-test]: FAILED! => {"changed": false, "msg": "Unable to start service stackdriver-agent: Job for stackdriver-agent.service failed because the control process exited with error code.\nSee \"systemctl status stackdriver-agent.service\" and \"journalctl -xe\" for details.\n"}

We could consider just removing them.

[sdigit]

This line breaks things without an appropriate else '': https://github.com/GoogleCloudPlatform/google-cloud-ops-agents-ansible/pull/66/files#diff-1da82c578776d2f38ea47d53ecff497366ccada016e145e149c37ae061d190ffR4

[qingling128]

Friendly ping.