opencollab: Initial version of role

This will download opencollab from github and install it with pip2.
Unfortunately ansible pip only checks if module is installed so
new versions are not updated automatically.

Running "pip2 uninstall opencollab" should trigger update on next
ansible run.

roles/opencollab/tasks/main.yml

@@ -0,0 +1,22 @@
+---
+
+- name: install dependencies
+  package:
+    name: "{{ item }}"
+    state: installed
+  with_items:
+    - git
+    - python2
+
+- name: copy package
+  git:
+    dest: /usr/local/src/opencollab
+    repo: "https://github.com/graphingwiki/opencollab.git"
+    version: fix-ssl-sni
+
+- name: install package
+  pip:
+    name: /usr/local/src/opencollab
+    umask: "0022"
+    executable: pip2
+    extra_args: --no-index