msc: move sms sending to BSC_ConnHdlr and send from within test flow

For the sole reason that f_vty_sms_send() was put on MTC_CT for no apparent
reason, we start the test function and send an SMS with an arbitrary two
seconds delay.

Instead move it to BSC_ConnHdlr and place SMS sending in the actual test
function flow where it belongs.

Change-Id: I5f348b3d30342b7c4871a1fc8f94648923e82eea
1 file changed