Transition from openstack.common.setup to pbr.

Declarative approach to packaging, obviates the need for copying files.
Also, removes the need for setup.py to import files from the nova
module.

./run_tests.sh now ensure's that nova.egg-info/entry_points.txt is up to
date before running tests.

Change-Id: I7b7a18e065a62491ade54fbed5d8400db1d4e6c7

tools/pip-requires

@@ -1,3 +1,5 @@
+d2to1>=0.2.10,<0.3
+pbr>=0.5,<0.6
 SQLAlchemy>=0.7.8,<0.7.99
 Cheetah>=2.4.4
 amqplib>=0.6.1
@@ -20,7 +22,6 @@ pyasn1
 Babel>=0.9.6
 iso8601>=0.1.4
 httplib2
-setuptools_git>=0.4
 python-cinderclient>=1.0.1
 python-quantumclient>=2.2.0,<3.0.0
 python-glanceclient>=0.5.0,<2

tools/test-requires

@@ -12,6 +12,7 @@ pep8==1.3.3
 pyflakes
 pylint==0.25.2
 python-subunit
+setuptools_git>=0.4
 sphinx>=1.1.2
 testrepository>=0.0.13
 testtools>=0.9.27