MT#61978 Fix invite_voicebox test

Attribute maxptime is now less strict and will just test
a number.

Change-Id: I61c4a5ddf54ef9e6c357c2fc96a7df61e47ef024

scenarios/invite_voicebox/sipp_scenario00_test.yml.tt2

@@ -35,7 +35,7 @@ messages:
   - 'a=rtpmap:8 PCMA/8000'
   - 'a=sendrecv'
   - 'a=rtcp:\d+'
-  - 'a=maxptime:150'
+  - 'a=maxptime:[0-9]+'
   - 'a=ptime:20'
 - - 'SIP/2.0 200 OK'
   - 'Record-Route: <sip:127.0.0.1:5062;lr=on;ftag=[^;]+>'