update requirements and test requirements

with the move to osc-lib we don't have to list some requirements.
removed oslo.config since it was not being used, and moved a few
to test-requirements since they are still used in examples and
unit tests.

Closes-Bug: 1593784

Change-Id: I39b610e6a49a4a346dddcedd231d9a7a81cab261

Author: stevemar

requirements.txt

@@ -8,14 +8,10 @@ Babel>=2.3.4 # BSD
 cliff!=1.16.0,!=1.17.0,>=1.15.0 # Apache-2.0
 keystoneauth1>=2.10.0 # Apache-2.0
 openstacksdk>=0.9.0 # Apache-2.0
-os-client-config!=1.19.0,>=1.13.1 # Apache-2.0
 osc-lib>=0.4.0 # Apache-2.0
-oslo.config>=3.14.0 # Apache-2.0
 oslo.i18n>=2.1.0 # Apache-2.0
 oslo.utils>=3.16.0 # Apache-2.0
 python-glanceclient>=2.0.0 # Apache-2.0
 python-keystoneclient!=1.8.0,!=2.1.0,>=1.7.0 # Apache-2.0
 python-novaclient!=2.33.0,>=2.29.0 # Apache-2.0
 python-cinderclient!=1.7.0,!=1.7.1,>=1.6.0 # Apache-2.0
-requests>=2.10.0 # Apache-2.0
-stevedore>=1.16.0 # Apache-2.0

test-requirements.txt

@@ -9,8 +9,11 @@ mock>=2.0 # BSD
 oslosphinx!=3.4.0,>=2.5.0 # Apache-2.0
 oslotest>=1.10.0 # Apache-2.0
 reno>=1.8.0 # Apache2
+requests>=2.10.0 # Apache-2.0
 requests-mock>=1.0 # Apache-2.0
 sphinx!=1.3b1,<1.3,>=1.2.1 # BSD
+stevedore>=1.16.0 # Apache-2.0
+os-client-config!=1.19.0,>=1.13.1 # Apache-2.0
 os-testr>=0.7.0 # Apache-2.0
 testrepository>=0.0.18 # Apache-2.0/BSD
 testtools>=1.4.0 # MIT