Added a variable so pkg-locations to be redefined

This change adds a variable to the repo-build.yml play so that
a deployer can redefine the locations for roles and user_variables.
This is useful for downstream deployers whom may not co-locate their
roles within the OSA deployment repository, the default Ansible role
directory, or within the /etc/openstack_deploy configuration directory.

Change-Id: I4a470536203da2b2da18adf1b436503a77b75ce9
Signed-off-by: Kevin Carter <kevin.carter@rackspace.com>

playbooks/repo-build.yml

@@ -21,10 +21,7 @@
     - name: Load local packages
       debug:
         msg: "Loading Packages"
-      with_py_pkgs:
-        - ../
-        - /etc/ansible/roles
-        - /etc/openstack_deploy
+      with_py_pkgs: "{{ pkg_locations }}"
       register: local_packages
       tags:
         - repo-clone-repos
@@ -44,3 +41,8 @@
       repo_build_pip_extra_index: "https://pypi.python.org/simple"
       tags:
         - "repo-build"
+  vars:
+    pkg_locations:
+      - ../
+      - /etc/ansible/roles
+      - /etc/openstack_deploy