* updated admin user case navigation to admin - overview page on login
* updated test_update_compute_defaults making it specific to compute
* defined test_update_volume_defaults & updated defaults page module
* removed skip decorator for test_create_delete_project as bug 1777359
is resolved
* cleaned up test_flavors and updated flavors page module
Change-Id: If529bfd7bc7fd0e29b42b12e601824ec6d684fca