Create a macro for module declarations

The modules are now declared with a common macro. This allows future
additions to the module loading process while also making the loaded
symbol name a constant.

server/modules/authenticator/GSSAPI/GSSAPIAuth/gssapi_auth.c

@@ -599,7 +599,7 @@ int gssapi_auth_load_users(SERV_LISTENER *listener)
 /**
  * Module handle entry point
  */
-MODULE_INFO* GetModuleObject()
+MODULE_INFO* MXS_CREATE_MODULE()
 {
     static GWAUTHENTICATOR MyObject =
     {

server/modules/authenticator/GSSAPI/GSSAPIBackendAuth/gssapi_backend_auth.c

@@ -263,7 +263,7 @@ static int gssapi_backend_auth_authenticate(DCB *dcb)
 /**
  * Module handle entry point
  */
-MODULE_INFO* GetModuleObject()
+MODULE_INFO* MXS_CREATE_MODULE()
 {
     static GWAUTHENTICATOR MyObject =
     {