DbtuxScan.cpp:

  fix erronous assert at scan close, lock abort


ndb/src/kernel/blocks/dbtux/DbtuxScan.cpp:
  Scan is closing.  Lock conf is in job buffer.
  We have sent lock abort to flush it out.
  At execute conf need to RNIL current lock op
  to avoid assert fail when abort comes.
  Bug seen couple of times, hard to test..

ndb/src/kernel/blocks/dbtux/DbtuxScan.cpp

@@ -602,6 +602,8 @@ Dbtux::execACCKEYCONF(Signal* signal)
     // LQH has the ball
     return;
   }
+  // lose the lock
+  scan.m_accLockOp = RNIL;
   // continue at ACC_ABORTCONF
 }
 
@@ -644,6 +646,8 @@ Dbtux::execACCKEYREF(Signal* signal)
     // LQH has the ball
     return;
   }
+  // lose the lock
+  scan.m_accLockOp = RNIL;
   // continue at ACC_ABORTCONF
 }