Update functionaltests to be able to run tox -e functional

Removed extra "nose" pre-req from tox.ini as it is already in
test-requirements.txt, and it causes a "double requirement"
error when running via tox.  Also fixed relative directory
reference to ensure we pick up the right etc/functional_tests.conf
file.

Change-Id: Iffb2891012ff0a4bb13a34bd7f8784104453b150

functionaltests/__init__.py

@@ -0,0 +1,25 @@
+"""
+Copyright 2015 Rackspace
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+"""
+import os
+
+from tempest import config
+
+CONF = config.CONF
+
+# Use local tempest conf if one is available.
+# This usually means we're running tests outside of devstack
+if os.path.exists('./etc/functional_tests.conf'):
+    CONF.set_config_path('./etc/functional_tests.conf')

functionaltests/client/__init__.py

@@ -22,8 +22,8 @@ CONF = config.CONF
 
 # Use local tempest conf if one is available.
 # This usually means we're running tests outside of devstack
-if os.path.exists('../etc/functional_tests.conf'):
-    CONF.set_config_path('../etc/functional_tests.conf')
+if os.path.exists('./etc/functional_tests.conf'):
+    CONF.set_config_path('./etc/functional_tests.conf')
 
 CONF.register_group(cfg.OptGroup('keymanager'))
 CONF.register_opt(cfg.StrOpt('url'), group='keymanager')

tox.ini

@@ -32,7 +32,6 @@ commands = python setup.py build_sphinx
 # Note: This requires local running instances of Barbican
 deps =
     {[testenv]deps}
-    nose
     git+https://github.com/openstack/tempest.git
 commands = nosetests {toxinidir}/functionaltests --match='{posargs}'