BUG#19394 OPT_INNODB_THREAD_CONCURRENCY duplicated

Removed duplication (not a user-visible change)

sql/mysqld.cc

@@ -4574,6 +4574,7 @@ enum options_mysqld
   OPT_INNODB_FILE_IO_THREADS,
   OPT_INNODB_LOCK_WAIT_TIMEOUT,
   OPT_INNODB_THREAD_CONCURRENCY,
+  OPT_INNODB_COMMIT_CONCURRENCY,
   OPT_INNODB_FORCE_RECOVERY,
   OPT_INNODB_STATUS_FILE,
   OPT_INNODB_MAX_DIRTY_PAGES_PCT,
@@ -5515,7 +5516,7 @@ log and this option does nothing anymore.",
    (gptr*) &innobase_buffer_pool_size, (gptr*) &innobase_buffer_pool_size, 0,
    GET_LL, REQUIRED_ARG, 8*1024*1024L, 1024*1024L, LONGLONG_MAX, 0,
    1024*1024L, 0},
-  {"innodb_commit_concurrency", OPT_INNODB_THREAD_CONCURRENCY,
+  {"innodb_commit_concurrency", OPT_INNODB_COMMIT_CONCURRENCY,
    "Helps in performance tuning in heavily concurrent environments.",
    (gptr*) &srv_commit_concurrency, (gptr*) &srv_commit_concurrency,
    0, GET_LONG, REQUIRED_ARG, 0, 0, 1000, 0, 1, 0},