MGCP_Test: do not use constant IP addresses

The RTP stream tests TC_two_crcx_and_unsolicited_rtp and
TC_two_crcx_and_one_mdcx_rtp_ho, which were introduced recently
with Change-Id I556a6efff0e74aab897bd8165200eec36e46629f, use
hardcoded ip addresses (127.0.0.1) to establish the RTP streams
that are used to test how the MGW reacts on unsolicited packets.
This works fine when everything runs on local host but on docker
it failes since the containers there have different ip-addresses.

- replace hardcoded IP-Addresses with modulepar variable in
  TC_two_crcx_and_unsolicited_rtp and TC_two_crcx_and_one_mdcx_rtp_ho

Change-Id: I5af5186f173c2b8564e8034249c82245acdd09f6
Related: OS#2703
1 file changed