Improved creation of test user login in User.t.
Improved creation of test user login in User.t.

MBRG/otrs,mburggraf/otrs,s7design/otrs,xhoy/otrs,xhoy/otrs,rudy500/otrs,MBRG/otrs,s7design/otrs,s7design/otrs,xhoy/otrs,xhoy/otrs,rudy500/otrs,rudy500/otrs,MBRG/otrs,mburggraf/otrs,mburggraf/otrs,rudy500/otrs,mburggraf/otrs,s7design/otrs,MBRG/otrs,MBRG/otrs,mburggraf/otrs,rudy500/otrs,s7design/otrs,xhoy/otrs