Add definitions of MXS_MODULE_NAME to all modules

All modules now declare a name for the module. This is name is added as a
prefix to all messages logged by a module. The prefix should help
determine which part of the system logs a message.

server/modules/routing/maxinfo/maxinfo_error.c

@@ -22,6 +22,9 @@
  *
  * @endverbatim
  */
+
+#include "maxinfo.h"
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -36,7 +39,6 @@
 #include <maxscale/spinlock.h>
 #include <maxscale/dcb.h>
 #include <maxscale/poll.h>
-#include "maxinfo.h"
 #include <maxscale/log_manager.h>