Improved unit test for oracle sequences, as it can not be made sure that sequences have no gaps.
Improved unit test for oracle sequences, as it can not be made sure that sequences have no gaps.

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