create_vdsm_changelog_wiki

This script reads git log output and based on Bug-Url tag open the
bugzilla and get target release and status data. If status is
different of ASSIGNED, POST or NEW the script will provide the changelog
for the current git branch in a wiki format.

Additionally, the script shows:
  - Number of bugzillas without target release
  - Number of bugzillas with target release but without branch
  - Number of bugzillas with no modified or on_qa status