Add UnitTest for loader backend.
Add UnitTest for loader backend.

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