Added GPL license + Don't log password

Implemented resmo suggestions.

messaging/rabbitmq_exchange.py

@@ -1,9 +1,29 @@
 #!/usr/bin/python
+# -*- coding: utf-8 -*-
+
+# (c) 2015, Manuel Sousa <manuel.sousa@gmail.com>
+#
+# This file is part of Ansible
+#
+# Ansible is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# Ansible is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Ansible.  If not, see <http://www.gnu.org/licenses/>.
+#
 
 DOCUMENTATION = '''
+---
 module: rabbitmq_exchange
 author: Manuel Sousa
-version_added: 2.0
+version_added: "2.0"
 
 short_description: This module manages rabbitMQ exchanges
 description:
@@ -95,7 +115,7 @@ def main():
             state = dict(default='present', choices=['present', 'absent'], type='str'),
             name = dict(required=True, type='str'),
             login_user = dict(default='guest', type='str'),
-            login_password = dict(default='guest', type='str'),
+            login_password = dict(default='guest', type='str', no_log=True),
             login_host = dict(default='localhost', type='str'),
             login_port = dict(default='15672', type='str'),
             vhost = dict(default='/', type='str'),