Use "project" as package primary key to compare tags
Use "project" as package primary key to compare tags

Currently, it's using package name when comparing tags in rdoinfo
commits, however package names can change and info-tag-diffs command
fail in this case.

This patch is changing the attribute to compare changes to project
instead of names which should be more accurate. In case a project
is renamed, it's interpreted as a new package so this case is
treated as expected.

Change-Id: Iffb92f6c41022793bf0d2de3eef23a9fbe5c7c91

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