Add playbooks to manage configuration files

[ivarmu]

What does this PR do?

Adds two playbooks to ease the management of the configuration files:

• rename_objects.yaml: If there's a need of renaming one credential (for example), this playbook can be used to rename the credential itself and update all the Job Templates / Workflows / Organizations... that are using the old credential name to the new one.
• set_organization.yaml: If you need to set the organization name for all the objects contained in a path, this playbook will do the job easy.

How should this be tested?

This can be applied to any path populated with CasC content. Each playbook has an execution example in the last line of the file.

Is there a relevant Issue open for this?

N/A

Other Relevant info, PRs, etc

N/A

[silvinux]

LGTM!