Added a modal dialog with the user credentials details

The modal contains all the credentials used to access the user's
openstack and EC2 instance.

Change-Id: I750b2922a34dd06b2098eff95d817c852a18be07
Implements: blueprint api-access-page-enhancements
Co-Authored-By: Cédric Soulas <cedric.soulas@cloudwatt.com>
Merge "Added a modal dialog with the user credentials details"