Fix test_opts to not resolve requirements
Fix test_opts to not resolve requirements

Glance py27 tests are broken because test_opts loads the
entry_points and resolves the deps. Some deps (I think
stevedore's) conflicts with pbr 1.0.0 which released
recently.

This patch loads the entry_points with require=False.

Change-Id: I0f36faa60a4688c8aba5e31f69e3f1818adb681a
(cherry picked from commit 99826d08d4c48cb83f4c5eb7fc79bba9ffd86f41)

darren-wang/gl,darren-wang/gl