Remove requests from requirements

With the move to keystoneauth, we no longert depend on the requests
library for anything at runtime. We do still have one test, which is
valid, that depends on requests to ensure that
https://bugs.launchpad.net/python-openstacksdk/+bug/1428342 stays fixed.
This change moves requests to test-requirements and additionally removes
the list of dependencies in the README file, as it duplicates the only
place requirements are truly needed.

Change-Id: I6aa8e71573e685b2748150ea5cec946b65d525ae

README.rst

@@ -30,16 +30,6 @@ Documentation
 Documentation is available at
 http://developer.openstack.org/sdks/python/openstacksdk/
 
-Requirements
-------------
-
-* Python 2.7, Python 3.3+
-* pbr
-* requests
-* six
-* stevedore
-* oslo.utils
-
 License
 -------
 

doc/source/contributors/setup.rst

@@ -106,21 +106,7 @@ or to run example scripts, you need to install the project's dependencies.::
    (sdk3)$ pip install -r requirements.txt
 
 After the downloads and installs are complete, you'll have a fully functional
-environment to use the SDK in. This step installs the following dependencies.
-
-* `oslo.utils <https://pypi.python.org/pypi/oslo.utils>`_, which we use
-  for its ``timeutils`` module when calculating if or when authentication
-  tokens are considered expired.
-* `pbr <https://pypi.python.org/pypi/pbr>`_, or the Python Build
-  Reasonableness project. pbr injects a set of common defaults which are used
-  throughout the OpenStack project.
-* `requests <https://pypi.python.org/pypi/requests>`_, which we use in the
-  :class:`~openstack.transport.Transport` class to handle HTTP requests and
-  responses.
-* `six <https://pypi.python.org/pypi/six>`_, which we use for compatibility
-  across Python 2 and 3.
-* `stevedore <https://pypi.python.org/pypi/stevedore>`_, which we use for
-  working with plugins. stevedore builds on setuptools ``entry_points``.
+environment to use the SDK in.
 
 Building the Documentation
 --------------------------

requirements.txt

@@ -2,7 +2,6 @@
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
 pbr>=1.6
-requests!=2.9.0,>=2.8.1
 six>=1.9.0
 stevedore>=1.5.0 # Apache-2.0
 oslo.utils>=3.2.0 # Apache-2.0

test-requirements.txt

@@ -10,6 +10,7 @@ mock>=1.2
 python-subunit>=0.0.18
 openstackdocstheme>=1.0.3
 os-testr>=0.4.1
+requests!=2.9.0,>=2.8.1
 requests-mock>=0.7.0 # Apache-2.0
 sphinx!=1.2.0,!=1.3b1,<1.3,>=1.1.2
 testrepository>=0.0.18