Print the error message if read of local config fails.

ndb/src/mgmsrv/main.cpp:
  Print error if read of local config file fails.

ndb/src/mgmsrv/main.cpp

@@ -346,8 +346,10 @@ static bool
 readLocalConfig(){
   // Read local config file
   LocalConfig lc;
-  if(!lc.init(glob.local_config_filename))
+  if(!lc.init(glob.local_config_filename)){
+    lc.printError();
     return false;
+  }
   
   glob.localNodeId = lc._ownNodeId;
   return true;