Adding liberty versions of oslo to requirements.txt

Adjusting tox so I can properly restrict the oslo libraries before installing
the python-keystoneclient

Change-Id: I7e99ca78d8fde326d2d97b55a790a6c9f911bc70

requirements.txt

@@ -1,10 +1,18 @@
+oslo.config<2.5.0
+oslo.i18n<=2.6.0
+oslo.log<1.12.0
+oslo.middleware<2.9.0
+oslo.serialization<1.10.0
+oslo.service<1.0
+oslo.utils<2.6.0
+
+python-keystoneclient<=1.7.2
+
 argparse
 babel
 iso8601>=0.1.9
-oslo.utils<2.0
 pbr>=0.11,<2.0
 PrettyTable>=0.7,<0.8
-python-keystoneclient==1.6.0
 PyYAML>=3.1.0
-requests>=1.1
+requests>=1.1,<2.8
 six>=1.7.0

tox.ini

@@ -13,7 +13,6 @@ commands = python setup.py testr --slowest --testr-args='{posargs}'
 
 [testenv:pep8]
 commands = flake8
-           {toxinidir}/tools/requirements_style_check.sh requirements.txt test-requirements.txt
 
 [testenv:venv]
 commands = {posargs}