FR testsuites: clean up all networks before start

Add a new network_clean_remove_all_ttcn3 function and use it in the fr
related testsuites to ensure no network is running before the test
starts. We just had the situation where the network link between
gtp0-deb10fr (where these testsuites run exclusively, and only one at a
time) and the jenkins host went down. And so the clean up trap
apparently did not run and starting a new test fails as the old network
still exists and has the network devices attached.

Related: OS#5802
Change-Id: I6a9464a11edcba978be08764bec9de19760a5c77

jenkins-common.sh

@@ -262,6 +262,35 @@ network_remove() {
 	docker network remove $NET_NAME
 }
 
+# Clean and remove all docker networks related to ttcn3 testing. This prevents
+# running testsuites in parallel, so usually we don't want this and rely on the
+# clean_up_trap to clean the network. But on e.g. gtp0-deb10fr this gets used
+# as we only run one testsuite at once and it has dahdi netdevices attached.
+# Due connection loss, it may not be cleaned up there and so another testsuite
+# cannot start.
+network_clean_remove_all_ttcn3() {
+	local networks
+	local i
+
+	networks="$(docker network ls --format '{{.Name}}' | grep ^ttcn3- || true)"
+
+	if [ -z "$networks" ]; then
+		return
+	fi
+
+	set +x
+	echo "Removing stale network and containers..."
+	set -x
+
+	for i in $networks; do
+		NET_NAME="$i"
+		network_clean
+		network_remove
+	done
+
+	unset NET_NAME
+}
+
 network_replace_subnet_in_configs() {
 	set +x
 

ttcn3-fr-test/jenkins.sh

@@ -30,6 +30,7 @@ cp FRNET_Tests.cfg $VOL_BASE_DIR/frnet/
 
 mkdir $VOL_BASE_DIR/unix
 
+network_clean_remove_all_ttcn3
 network_create
 network_replace_subnet_in_configs
 

ttcn3-gbproxy-test-fr/jenkins.sh

@@ -33,6 +33,7 @@ cp osmo-gbproxy.cfg $VOL_BASE_DIR/gbproxy/
 
 mkdir $VOL_BASE_DIR/unix
 
+network_clean_remove_all_ttcn3
 network_create
 network_replace_subnet_in_configs
 

ttcn3-ns-test/jenkins-fr.sh

@@ -29,6 +29,7 @@ write_mp_osmo_repo "$VOL_BASE_DIR/ns-tester/NS_Tests.cfg"
 mkdir $VOL_BASE_DIR/ns
 cp fr/osmo-ns-dummy.cfg $VOL_BASE_DIR/ns/
 
+network_clean_remove_all_ttcn3
 network_create
 network_replace_subnet_in_configs