[Trivial] Fix initialization code of TSDB_MOD_MGMT module.

* Description
This patch fixes enablement of TSDB_MOD_MGMT module, which was
incorrectly assign to 'name' variable.

* Testing
Compile the code. Feel free to suggest more testing that needs to
be done. Given that 'tsModule' is zero initialized, I don't think
there's any functional difference for this patch.

src/dnode/src/dnodeModule.c

@@ -44,7 +44,7 @@ static void dnodeUnSetModuleStatus(int32_t module) {
 }
 
 static void dnodeAllocModules() {
-  tsModule[TSDB_MOD_MGMT].name         = false;
+  tsModule[TSDB_MOD_MGMT].enable       = false;
   tsModule[TSDB_MOD_MGMT].name         = "mgmt";
   tsModule[TSDB_MOD_MGMT].initFp       = mgmtInitSystem;
   tsModule[TSDB_MOD_MGMT].cleanUpFp    = mgmtCleanUpSystem;