Fix 4 replica bug in packLqhKeyReq, problem introduced by opt. nr.


storage/ndb/src/kernel/blocks/dblqh/DblqhMain.cpp:
  Fix packLqhKeyReqLab when having full AI in this and appending gci/rowid (used to casue 23+3 = 26 in signal length)
  Note: This is a very ineffectice patch, but only for 4 replicas
  This will be fixed when sending lqhkeyreq as long signal (or even just attrinfo as long)