Add docimpact tag for bugs that target project queues

For bugs that are filed against the project's queue rather than the
openstack-manuals queue, it's useful to classify them further by
adding a doc-relevant tag. This way, the project's bug team can do
a much easier look up to ensure that these bugs do not go unnoticed.

Change-Id: Ic9d2bdffd4acca3bb093f5037e62582961919ebf
1 file changed