Merge branch 'release_2.4.0' into devel

* release_2.4.0: (70 commits)
  Disallow changing a users password for social auth
  bump django-radius to include new license
  Change Jenkins server references from IP to DNS name
  Social auth and SSO updates:
  allow multi-org expired licenses to delete orgs
  Add social log messages to tower's log on error
  Update default scopes requested for github social auth.
  Switch to matburt's fork for python social auth
  Emit a warning for unmapped SAML paramters
  Fix up some SAML issues
  Remove `environment` play stmt
  Use correct aw_repo_url when building packer
  Add missing libxmlsec1 openssl dependency for ubuntu
  adds socket tests
  added git pre commit hook to run flake8
  fixes remove_instance error
  null pointer exception
  Resolve issue on precise keeping old debs around
  Attach handlers to django_auth_ldap
  Attach handlers to django_auth_ldap
  ...

awx/ui/client/assets/cowsay-about.html

@@ -1,7 +1,7 @@
 
 <div id="about-dialog-body">
     <div class="row">
-        <div class="col-xs-12 col-sm-5">
+        <div class="col-xs-12 col-sm-5 About-cowsay">
             <div style="width: 340px; margin: 0 auto;">
 <pre id="cowsay">
  ________________
@@ -19,10 +19,11 @@
         <div  class="col-xs-12 col-sm-7 text-center">
             <img id="about-modal-titlelogo" src="/static/assets/ansible_tower_logo_minimalc.png"><br>
             <p>Copyright 2015.  All rights reserved.</p>
-            <p>Ansible and Ansible Tower are registered trademarks of Ansible, Inc.</p>
+            <p>Ansible and Ansible Tower are registered trademarks of Red Hat, Inc.</p>
+            <br>
+            <img class="About-redhat" src="/static/assets/redhat_ansible_lockup.png">
             <br>
             <p>Visit <a href="http://www.ansible.com" target="_blank">Ansible.com</a> for more information.</p>
-            <br>
             <p><span id='about-modal-subscription'></span></p>
     </div>
 </div>