Revert "fixes #6573 - foretello should error when sorting by non-sortable field, BZ 1110431"

This reverts commit 3ec51c074a3decb6656f85195d98b39f57ccf430.

will re-introduce this fix at a later date when we have some testing
around sorting
fixes #6565 - show kickstart url from content source if it can be calculated. otherwise don't hide media drop down
refs #6720 - fixing apidoc route for errata apply
Fixes #6995: restore pulp_celerybeat to list of services to restart.

The service pulp_celerybeat was removed from the list of services
restarted with a katello:reset during the pulp 2.4 upgrade. Restarting
the service is working fine now so this commit restores pulp_celerybeat
to the list of services to start/stop during katello:reset.

http://projects.theforeman.org/issues/6995
Merge pull request #4540 from komidore64/revert-rmi6573

Revert "fixes #6573 - foretello should error when sorting by non-sortabl...
Merge pull request #4548 from komidore64/rmi6720-content-management-commands

refs #6720 - fixing apidoc route for errata apply
Merge pull request #4539 from isratrade/6565

fixes #6565 - show kickstart url from content source if it can be calculated. otherwise don't hide media drop down
Merge pull request #4552 from waldenraines/6995

Fixes #6995: restore pulp_celerybeat to list of services to restart.
--amend