scripts: net: Add SOCKS 5 to MQTT TLS sample test

Start SOCKS5 proxy in the net-tools Docker image and run MQTT TLS
tests with SOCKS enabled. Since the MQTT TLS server is already
running as of the previous test, start only the danted daemon.

Rely on mosquitto MQTT port being handled by the Docker image
configuration file instead of specifying it on the command line.

Signed-off-by: Patrik Flykt <patrik.flykt@intel.com>

scripts/net/run-sample-tests.sh

@@ -317,7 +317,7 @@ docker_exec ()
 
 	mqtt_publisher)
 	    start_configuration || return $?
-	    start_docker "/usr/local/sbin/mosquitto -v -p 1883
+	    start_docker "/usr/local/sbin/mosquitto -v
 			  -c /usr/local/etc/mosquitto/mosquitto.conf" || \
 			      return $?
 
@@ -326,16 +326,13 @@ docker_exec ()
 	    wait_zephyr
 	    result=$?
 
-	    stop_docker
-
 	    if [ $result -ne 0 ]
 	    then
 		break
 	    fi
 
 	    # test TLS
-	    start_configuration || return $?
-	    start_docker "/usr/local/sbin/mosquitto -v -p 8883
+	    start_docker "/usr/local/sbin/mosquitto -v
 			  -c /usr/local/etc/mosquitto/mosquitto-tls.conf" || \
 			      return $?
 
@@ -345,6 +342,26 @@ docker_exec ()
 
 	    wait_zephyr
 	    result=$?
+
+	    if [ $result -ne 0 ]
+	    then
+		break
+	    fi
+
+	    # TLS and SOCKS5, mosquitto TLS is already running
+	    start_docker "/usr/sbin/danted" || \
+		return $?
+
+	    start_zephyr \
+		-DOVERLAY_CONFIG="overlay-tls.conf overlay-sample.conf overlay-socks5.conf" \
+		 "$overlay" || return $?
+
+	    wait_zephyr
+	    result=$?
+
+	    stop_docker
+
+	    return $result
 	    ;;
 
 	*)