gap_ble_dequeue_request() function

* Function gap_ble_cl_op_cmpl * Description GAP client operation complete callback * Returns void

* Function gap_ble_send_cl_read_request * Description utility function to send a read request for a GAP characteristic * Returns TRUE if read started, else FALSE if GAP is busy

* Function gap_ble_dealloc_clcb * Description The function clean up the pending request queue in GAP * Returns none

* Function gap_ble_enqueue_request * Description The function enqueue a GAP client request * Returns TRUE is successful; FALSE otherwise