Remove old credentials files from features dir

* The non-refactored credentials code has been returned to its
original location. Inventories and Jobs pull in Credentials
based on its original location in the file structure.
* Apply margin to individual inputs instead of panels to have
consistent spacing at more narrow resolutions.
* Add placeholder for a Lookup component which will be necessary
to let users select an org for the credential.

awx/ui/client/lib/components/_index.less

@@ -4,3 +4,4 @@
 @import 'modal/_index';
 @import 'popover/_index';
 @import 'tabs/_index';
+@import 'utility/_index';