Do not include merge commits in list of changes
Do not include merge commits in list of changes

When finding the changes in utils.git.get_commit_bzs(), we do not
want to include merge commits, since that would mean including the
same commit twice in the changelog.

Change-Id: Ia00b776fe63197cce5b5752c6b1fea0dbed589b0

openstack-packages/rdopkg,redhat-openstack/rdopkg,openstack-packages/rdopkg,redhat-openstack/rdopkg