Updated openstack/openstack
Project: openstack/tempest  b7e710fa6b935c44f9be43f1237f2d865ccc2e31
null
Set stable/havana to default git review branch

This commit changes the default branch for commits in the stable/havanna
branch.

Change-Id: I47fc16bb332c71350e26ec71e8591001b549c12a