Tronde/ansible-role-rhel-patchmanagement

This release is using ansible groups called rhel-patch-phases instead of stage related groups to determine on which hosts a patch set is to run at the due date.

I have decided to increment the major release number because I'm not entirely sure if previous setups would break after updating to this version.

Changelog

• Using rhel-patch-phases instead of stage groups in this role
• Added hosts.example to show the usage of the new ansible groups
• Improved the README.md

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