Jenkins job to do daily node maintenance

[VermaSh]

We'll need a job that runs periodically and validates the machines on Jenkins with those in the inventory file. Along with adding machines the job will also any labels mentioned in the inventory file.

[VermaSh]

I have a job that adds new nodes and adds the default labels (Endian, OS, architecture and kernel). I am also working on a job that will pull the inventory file from git. I'll push them both soon.

[gdams]

So a useful command to know would be python ansible/plugins/inventory/adoptopenjdk_yaml.py (run from the root of the infrastructure repo). This will return a large JSON _meta object like this:

"_meta": {
    "hostvars": {
      "build-osuosl-centos74-ppc64le-1": {
        "uid": "1", 
        "type": "build", 
        "ansible_become": true, 
        "ansible_user": "centos", 
        "arch": "ppc64le", 
        "provider": "osuosl", 
        "os": "centos74", 
        "ansible_host": "140.211.168.138"
      }, 
      "build-scaleway-ubuntu1604-x64-2": {
        "uid": "2", 
        "provider": "scaleway", 
        "type": "build", 
        "os": "ubuntu1604", 
        "ansible_host": "51.15.46.107", 
        "arch": "x64"
      } 
}

[VermaSh]

@gdams thanks! I'll look into it

[VermaSh]

I have just created a PR for the second part of this issue, creating new nodes. I have submitted the parts separate because those jobs were very close to their usable states and incase I don't get around to finishing the Node maintenance job there'll at least be these jobs to automate most of the work.