Move ansible test requirements into tox.ini

In order to prepare for implementing requirements management by the
OpenStack requirements management process, all requirements in
requirements.txt and test-requirements.txt need to be in the
global-requirements file.

As ansible and ansible-lint are not in those files, this patch moves
them into explicit deps for the ansible environments in tox.ini.

Change-Id: If661d8d5aff86f3bb163624052e41160dd3c9a18

test-requirements.txt

@@ -1,5 +1,3 @@
-ansible-lint>=2.7.0,<3.0.0
-ansible>=1.9.1,<2.0.0,!=1.9.6
 bashate>=0.2 # Apache-2.0
 flake8>=2.5.4,<2.6.0  # MIT
 

tox.ini

@@ -95,6 +95,10 @@ commands =
 
 
 [testenv:ansible]
+deps =
+    {[testenv]deps}
+    ansible==1.9.4
+    ansible-lint>=2.7.0,<3.0.0
 setenv =
     {[testenv]setenv}
     ANSIBLE_HOST_KEY_CHECKING = False
@@ -125,6 +129,8 @@ commands =
 
 
 [testenv:ansible-syntax]
+deps =
+    {[testenv:ansible]deps}
 setenv =
     {[testenv:ansible]setenv}
 commands =
@@ -137,6 +143,8 @@ commands =
 
 
 [testenv:ansible-lint]
+deps =
+    {[testenv:ansible]deps}
 commands =
     ansible-lint {toxinidir}
 
@@ -147,6 +155,8 @@ commands =
 # drop the install_command.
 install_command =
     pip install -U --force-reinstall {opts} {packages}
+deps =
+    {[testenv:ansible]deps}
 setenv =
     {[testenv:ansible]setenv}
 commands =
@@ -158,6 +168,8 @@ commands =
 
 
 [testenv:linters]
+deps =
+    {[testenv:ansible]deps}
 setenv =
     {[testenv:ansible]setenv}
 commands =