Rename requires files to standard names.

Rename tools/pip-requires to requirements.txt and tools/test-requires
to test-requirements.txt. These are standard files, and tools in the
general world are growing intelligence about them.

Change-Id: Ic220b54de5ce7c15f442b8ffcb97cd03c2344f9a
Fixes: bug #1179008

tools/pip-requires

@@ -1,8 +0,0 @@
-d2to1>=0.2.10,<0.3
-pbr>=0.5,<0.6
-
-argparse
-prettytable>=0.6,<0.8
-python-keystoneclient>=0.1.2,<1
-pyOpenSSL
-warlock>=0.7.0,<2

tools/test-requires

@@ -1,16 +0,0 @@
-distribute>=0.6.24
-
-# Install bounded pep8/pyflakes first, then let flake8 install
-pep8==1.4.5
-pyflakes==0.7.2
-flake8==2.0
-hacking>=0.5.3,<0.6
-
-coverage
-discover
-mox
-mock>=0.8.0
-setuptools-git>=0.4
-sphinx>=1.1.2
-testrepository>=0.0.13
-testtools>=0.9.22