Fixed: Process Modules, Dynamic Fields, and ACLs with AJAX update (bug#10202).
Fixed: The system still consider the customer_ids, even after field is empty on table customer_user (bug#9098).
Squashed commit of the following:

commit b48716c30455bde2cd57e9145b151405c9771b8f
Author: s7design <otrs@s7designcreative.com>
Date:   Sat Apr 5 17:12:00 2014 +0200

    [Bug 9098] The system still consider the customer_ids, even after field is empty on table customer_user

    Added code for delete cache for CustomerIDs

Conflicts:
	CHANGES.md
Merge remote-tracking branch 'upstream/rel-3_2' into rel-3_2