youtube: Fix batch tests
youtube: Fix batch tests

Due to the fixes in GDataBatchOperation which ensure that callbacks are
always called for every operation, the batch operation tests need fixing.

pwithnall/libgdata,Pecisk/libgdata-gtasks,Pecisk/libgdata,pwithnall/libgdata,Pecisk/libgdata-gtasks,Distrotech/libgdata,Distrotech/libgdata,Distrotech/libgdata,Pecisk/libgdata,Pecisk/libgdata,GNOME/libgdata,Pecisk/libgdata-gtasks