Set up dependencies for cross-tests

Set up the venv environment to let us use it for pre-release cross
testing to ensure we don't break consuming project unit tests.

Change-Id: If2bee203cb120b6c3b17a863fca2ece12651024f

.gitignore

@@ -24,3 +24,6 @@ WSME.egg-info/
 AUTHORS
 ChangeLog
 pbr*.egg
+
+# Cross-test logs
+cross-test-*.log

tox-tmpl.ini

@@ -126,5 +126,7 @@ commands = flake8 wsme wsmeext setup.py
 [testenv:venv]
 commands = {posargs}
 usedevelop=True
-deps=
-    pbr
+deps =
+	pbr
+    oslo.config
+    oslotest

tox.ini

@@ -81,6 +81,8 @@ commands = {posargs}
 usedevelop = True
 deps = 
 	pbr
+	oslo.config
+	oslotest
 
 [testenv:py27-sa5-lxml-json]
 commands =