Implement IuCS (large refactoring and addition)

osmo-nitb becomes osmo-msc
add DIUCS debug log constant
add iucs.[hc]
add msc vty, remove nitb vty
add libiudummy, to avoid linking Iu deps in tests
Use new msc_tx_dtap() instead of gsm0808_submit_dtap()
libmgcp: add mgcpgw client API
bridge calls via mgcpgw

Enable MSC specific CTRL commands, bsc_base_ctrl_cmds_install() still needs to
be split up.

Change-Id: I5b5b6a9678b458affa86800afb1ec726e66eed88
diff --git a/tests/testsuite.at b/tests/testsuite.at
index c3f939f..f21ba0c 100644
--- a/tests/testsuite.at
+++ b/tests/testsuite.at
@@ -33,6 +33,13 @@
 AT_CHECK([$abs_top_builddir/tests/mgcp/mgcp_transcoding_test], [], [expout], [ignore])
 AT_CLEANUP
 
+AT_SETUP([mgcpgw_client])
+AT_KEYWORDS([mgcpgw_client])
+cat $abs_srcdir/mgcp/mgcpgw_client_test.ok > expout
+cat $abs_srcdir/mgcp/mgcpgw_client_test.err > experr
+AT_CHECK([$abs_top_builddir/tests/mgcp/mgcpgw_client_test], [], [expout], [experr])
+AT_CLEANUP
+
 AT_SETUP([gprs])
 AT_KEYWORDS([gprs])
 cat $abs_srcdir/gprs/gprs_test.ok > expout