Rename requires files to standard names

requested by infra.

bug 1179008

Change-Id: Id27f574a023792c287ed4e11aa869cb50857aa8f

tox.ini

@@ -2,8 +2,8 @@
 envlist = py26,py27,pep8
 
 [testenv]
-deps = -r{toxinidir}/tools/test-requires
-       -r{toxinidir}/tools/pip-requires
+deps = -r{toxinidir}/requirements.txt
+       -r{toxinidir}/test-requirements.txt
 setenv = VIRTUAL_ENV={envdir}
          EVENTLET_NO_GREENDNS=yes
 commands =
@@ -26,14 +26,14 @@ commands =
     flake8 ceilometer setup.py bin/ceilometer-agent-central bin/ceilometer-agent-compute bin/ceilometer-collector bin/ceilometer-api tests
 
 [testenv:docs]
-deps = -r{toxinidir}/tools/test-requires
-       -r{toxinidir}/tools/pip-requires
+deps = -r{toxinidir}/requirements.txt
+       -r{toxinidir}/test-requirements.txt
        sphinxcontrib-httpdomain
 commands = python setup.py build_sphinx
 
 [testenv:venv]
-deps = -r{toxinidir}/tools/test-requires
-       -r{toxinidir}/tools/pip-requires
+deps = -r{toxinidir}/requirements.txt
+       -r{toxinidir}/test-requirements.txt
        sphinxcontrib-httpdomain
 commands = {posargs}