dht-rebalance.c: fix clang compilation warning

Fix:
dht-rebalance.c:2259:33: warning: implicit conversion from enumeration type 'enum entrylk_cmd' to different enumeration type 'entrylk_type' (aka 'enum entrylk_type') [-Wenum-conversion]
 2257 |         lk_ret = syncop_entrylk(hashed_subvol, DHT_ENTRY_SYNC_DOMAIN,
      |                  ~~~~~~~~~~~~~~
 2258 |                                 &parent_loc, loc->name, ENTRYLK_UNLOCK,
 2259 |                                 ENTRYLK_UNLOCK, NULL, NULL);
      |                                 ^~~~~~~~~~~~~~

This is not very clear - there's a very clear copy-pasta here, but is the fix to turn it into ENTRYLK_WRLCK ?
Every other caller seem to think so, so this is the change.

Signed-off-by: Yaniv Kaul <[email protected]>

Author: mykaul

xlators/cluster/dht/src/dht-rebalance.c

@@ -2256,7 +2256,7 @@ dht_migrate_file(xlator_t *this, loc_t *loc, xlator_t *cached_subvol,
     if (entrylk_locked) {
         lk_ret = syncop_entrylk(hashed_subvol, DHT_ENTRY_SYNC_DOMAIN,
                                 &parent_loc, loc->name, ENTRYLK_UNLOCK,
-                                ENTRYLK_UNLOCK, NULL, NULL);
+                                ENTRYLK_WRLCK, NULL, NULL);
         if (lk_ret < 0) {
             gf_msg(this->name, GF_LOG_WARNING, -lk_ret,
                    DHT_MSG_MIGRATE_FILE_FAILED,