Fix SessionID in OTRS_SessionCreateResponse

Needs to be xsd:string, not an int. This fixes SessionCreate with python-suds for me.
Added missing load of helper module.
Merge branch 'rel-3_3' of github.com:TauPan/otrs into TauPan-rel-3_3
Fixed: GenericInterface: mapping key can't map from / to 0 (bug#10259).
Fixed: Customer search during ticket creation - OTRS shows details also if no customer match the search (bug#10222).
Squashed commit of the following:

commit a098f3d99b847d5338a0ec3ae1ec2d7748e91578
Author: s7design <otrs@s7designcreative.com>
Date:   Tue Feb 4 23:47:16 2014 +0100

    [Bug 10222] Customer search during ticket creation - OTRS shows details also if no customer match the search

    Deleted default value for parameter CustomerUserID in function GetCustomerInfo
Fixed: Queue field doesn't appear in ProcessMgmt (bug#9787).