Updated openstack/openstack
Project: openstack-dev/pbr  5ac3783712938b17977c50d1fca0b7c1ccbd9710

Only consider tags that look like versions.

pbr has been allowing any tag (e.g. 'fred') to be a version - but fred
is clearly not a version! Since git describe cannot validate versions
for us today, we need to perform the describe calculations ourselves.

In order for this to work on Python3, a missing method __hash__ needed
to be added to SemanticVersion.

Change-Id: I09fa54231e77ae7671aa6f84eb91fd655e49ab25
Closes-Bug: #1356784