Improved system registration by also sending the old API key in the Register function.
Implemented QA suggestions, bug#9950 - Ticket Split takes uses system address as the customer.
Implemented QA suggestions, bug#10035 - Adding a GenericAgent Job with an already existing name, will not be added, no error displayed.
Removed unnedded variable definition.
Revert "Fixed bug#10044 - PendingDiffTime removes 2013 (current year) when reaching end of the year."

This reverts commit 1697dd85cb7542ce484c813b511a1e3778f4ce10.

Conflicts:
	CHANGES.md
Added new version to CHANGES.md file.
Merge remote-tracking branch 'upstream/master' into otrs-master