[JENKINS-18282] Introduce get-node CLI command
[JENKINS-18282] Introduce update-node CLI command
[JENKINS-18282] Introduce create-node CLI command
Introduce CLICommandInvoker for testing purposes
[FIXED JENKINS-18282] Optionally override name from XML in create-node CLI command
Merge branch 'master' into node-cli
Merge pull request #803 from olivergondza/node-cli

[FIXED JENKINS-18282] - Manipulate nodes via CLI