MT#55283 Fix for "opus<>opus+DTMF" test

Fix for "opus<>opus+DTMF" auto test.
Receive when port is already known.

Fixes:
Use of uninitialized value $port in numeric eq (==) at ../perl/NGCP/Rtpengine/AutoTest.pm line 239.

Change-Id: Ic0089bae769ccafeb7145e703a6e21029da85a97

t/auto-daemon-tests.pl

@@ -245,7 +245,6 @@ a=ptime:20
 SDP
 
 snd($sock_b, $port_a, rtp(119, 2000, 4000, 0x123494f, "\x08\x09\x97\x2a\x18\x8d\xbb\x4d\x93\xfb\x73\x40\x4c\xcd\x84\xb8\x27\xb1\x11\x71\xdd\x3a\xd7\x93\x2b\xa9\x11\xeb\x5f\xc6\x42\x9d\xc9\xa0\x84\x44\x3c\x60\xfc\xb8"));
-rcv($sock_a, $port_b, rtpm(119, 2000, 4000, 0x123494f, "\x08\x09\x97\x2a\x18\x8d\xbb\x4d\x93\xfb\x73\x40\x4c\xcd\x84\xb8\x27\xb1\x11\x71\xdd\x3a\xd7\x93\x2b\xa9\x11\xeb\x5f\xc6\x42\x9d\xc9\xa0\x84\x44\x3c\x60\xfc\xb8"));
 
 ($port_b) = answer('opus<>opus+DTMF', { flags => [qw,allow-asymmetric-codecs,] }, <<SDP);
 v=0
@@ -276,6 +275,8 @@ a=ptime:20
 a=maxptime:60
 SDP
 
+rcv($sock_a, $port_b, rtpm(119, 2000, 4000, 0x123494f, "\x08\x09\x97\x2a\x18\x8d\xbb\x4d\x93\xfb\x73\x40\x4c\xcd\x84\xb8\x27\xb1\x11\x71\xdd\x3a\xd7\x93\x2b\xa9\x11\xeb\x5f\xc6\x42\x9d\xc9\xa0\x84\x44\x3c\x60\xfc\xb8"));
+
 snd($sock_b, $port_a, rtp(119, 2001, 4960, 0x123494f, "\x08\x09\x92\x4c\x09\x80\xf5\x6a\xd8\xe1\x0e\x57\x55\x0d\xb0\xf4\x9f\x5f\xaf\xe4\xdc\xa7\x2d\x74\x99\xb8\x10\xaa\x3a\xa8\xe5\x18\x6e\x8f\x87\xe4\xc9\x33\xbb"));
 rcv($sock_a, $port_b, rtpm(119, 2001, 4960, 0x123494f, "\x08\x09\x92\x4c\x09\x80\xf5\x6a\xd8\xe1\x0e\x57\x55\x0d\xb0\xf4\x9f\x5f\xaf\xe4\xdc\xa7\x2d\x74\x99\xb8\x10\xaa\x3a\xa8\xe5\x18\x6e\x8f\x87\xe4\xc9\x33\xbb"));