Make queue max message size configurable

Summary
-------
This commit fixes the issue #424

Details
--------
- Add a the configuration option TX_QUEUE_MESSAGE_MAX_SIZE in the tx_api.h with default value
  set to TX_ULONG_16 to keep backword compatibility.
- Update the txe_queue_create() to check on TX_QUEUE_MESSAGE_MAX_SIZE rather than TX_ULONG_16
  as max message size.
- Add a new unitary test to cover the new change.

test/tx/regression/testcontrol.c

@@ -171,6 +171,7 @@ void    threadx_queue_basic_two_word_application_define(void *);
 void    threadx_queue_basic_four_word_application_define(void *);
 void    threadx_queue_basic_eight_word_application_define(void *);
 void    threadx_queue_basic_sixteen_word_application_define(void *);
+void    threadx_queue_basic_max_message_size_application_define(void *);
 void    threadx_queue_empty_suspension_application_define(void *);
 void    threadx_queue_full_suspension_application_define(void *);
 void    threadx_queue_suspension_timeout_application_define(void *);
@@ -287,6 +288,7 @@ TEST_ENTRY  test_control_tests[] =
     threadx_queue_basic_four_word_application_define,
     threadx_queue_basic_eight_word_application_define,
     threadx_queue_basic_sixteen_word_application_define,
+    threadx_queue_basic_max_message_size_application_define,
     threadx_queue_empty_suspension_application_define,
     threadx_queue_full_suspension_application_define,
     threadx_queue_suspension_timeout_application_define,
@@ -1193,6 +1195,7 @@ void  test_control_return(UINT status)
 
 UINT    old_posture =  TX_INT_ENABLE;
 
+    printf("********** Running Queue Max Message Size Test (%u) ************** \n ", TX_QUEUE_MESSAGE_MAX_SIZE);
 
     /* Save the status in a global.  */
     test_control_return_status =  status;