added DeleteHistoryOfTicket()
added DeleteHistoryOfTicket()

mburggraf/otrs,MBRG/otrs,mburggraf/otrs,nilei/otrs,brandonshults01/otrs,balazj/otrs,s7design/otrs,brandonshults01/otrs,capeit-tto/otrs,muehlbauer/otrs,crythias/otrs,MBRG/otrs,linearregression/otrs,rudy500/otrs,PortgasDAce/otrs,noritnk/otrs,crythias/otrs,crythias/otrs,linearregression/otrs,mburggraf/otrs,brandonshults01/otrs,MBRG/otrs,noritnk/otrs,oiami/otrs,thorsteneckel/otrs,StCyr/otrs,MBRG/otrs,thorsteneckel/otrs,s7design/otrs,xhoy/otrs,moritz/otrs,moritz/otrs,StCyr/otrs,rudy500/otrs,rudy500/otrs,vlascoder/otrs,eliasp/otrs,MBRG/otrs,balazj/otrs,rudy500/otrs,oiami/otrs,brandonshults01/otrs,thorsteneckel/otrs,StCyr/otrs,eliasp/otrs,s7design/otrs,nilei/otrs,xhoy/otrs,eliasp/otrs,linearregression/otrs,muehlbauer/otrs,PortgasDAce/otrs,nilei/otrs,noritnk/otrs,thorsteneckel/otrs,nilei/otrs,xhoy/otrs,mburggraf/otrs,oiami/otrs,muehlbauer/otrs,thorsteneckel/otrs,balazj/otrs,mbeijen/otrs-1,linearregression/otrs,crythias/otrs,StCyr/otrs,StCyr/otrs,eliasp/otrs,balazj/otrs,s7design/otrs,capeit-tto/otrs,capeit-tto/otrs,oiami/otrs,PortgasDAce/otrs,moritz/otrs,PortgasDAce/otrs,xhoy/otrs,s7design/otrs,rudy500/otrs,vlascoder/otrs,balazj/otrs,mbeijen/otrs-1,xhoy/otrs,mbeijen/otrs-1,moritz/otrs,muehlbauer/otrs,mburggraf/otrs,vlascoder/otrs,linearregression/otrs,eliasp/otrs,nilei/otrs,PortgasDAce/otrs,crythias/otrs,brandonshults01/otrs,muehlbauer/otrs,moritz/otrs,oiami/otrs