Run cloud launcher with latest release candidate

Along with the requirements change, there are also needed changes
roles_path and ansible_python_interpreter variable handling, for
some reason latest Ansible did not like current configuration.

Change-Id: I5fc78d479e276711365ea497edd4d3e38cacd650

requirements.txt

@@ -1,2 +1,2 @@
-ansible==2.1.0.0
+-e git://github.com/ansible/ansible.git@v2.1.2.0-0.3.rc3#egg=ansible
 shade

tests/ansible.cfg

@@ -1,3 +1,3 @@
 [defaults]
 host_key_checking = False
-roles_path = ..
+roles_path = ../..

tests/inventory

@@ -1,2 +1,2 @@
 [test]
-test01 ansible_host=localhost ansible_connection=local ansible_python_interpreter=.tox/functional/bin/python
+test01 ansible_host=localhost ansible_connection=local

tox.ini

@@ -10,7 +10,7 @@ deps = -r{toxinidir}/requirements.txt
 [testenv:functional]
 commands =
   ansible-playbook -i tests/inventory tests/test.yaml \
-    -e "@tests/resources.yml"
+    -e "@tests/resources.yml" -e "ansible_python_interpreter={toxinidir}/.tox/functional/bin/python"
 passenv = HOME
 setenv =
   ANSIBLE_CONFIG = {toxinidir}/tests/ansible.cfg