move to osmo-mgw.git: osmo-bsc_mgcp and libmgcp as libosmo-legacy-mgcp

Rewire build and includes to libosmo-legacy-mgcp.

Drop osmo-bsc_mgcp and related python tests, now found in osmo-mgw.git.

libosmo-legacy-mgcp is installed from osmo-mgw, hence add the dependency to
jenkins.sh (so far using the pre_release branch).

Change-Id: Ic99d681759edce11564da62500c2aac5cf5fffe2
diff --git a/include/openbsc/gsm_data.h b/include/openbsc/gsm_data.h
index 6079900..88a4f10 100644
--- a/include/openbsc/gsm_data.h
+++ b/include/openbsc/gsm_data.h
@@ -17,7 +17,7 @@
 #include <openbsc/common.h>
 #include <openbsc/rest_octets.h>
 #include <openbsc/common_cs.h>
-#include <openbsc/mgcpgw_client.h>
+#include <osmocom/legacy_mgcp/mgcpgw_client.h>
 
 
 /** annotations for msgb ownership */