several enhancements

[richm]

Fix formatting of rpm_release spec changelog entries, git commit message entries

Add support for

• labels - add RHEL-System-Roles, and fixed_upstream if PR was merged
• itr, itm, and dtm
• docs_impact field
• dev_ack - set if there is a PR - qa_ack - will be set when cloned

Improve cloning - copy additional fields