Replace assertEqual(True/False, *) -> assertTrue/False(*)
Replace assertEqual(True/False, *) -> assertTrue/False(*)

Inspired by Dave Chen's change request on keystone about this, I
decided to check in refstack code to see if there were many cases.

Since unittest provides assertTrue and assertFalse, it is better
to use assertTrue(var) instead of assertEqual(True, var) and the same
thing applies to assertFalse.

Change-Id: I3fce4de35160c2d58f83d26403fa251d4437c2a3
Closes-Bug: #1531125

stackforge/refstack,openstack/refstack,openstack/refstack,openstack/refstack,stackforge/refstack,stackforge/refstack,openstack/refstack,stackforge/refstack