Add tests from develop

Added tests from develop. The test results need to be modified for 2.0.

maxscale-system-test/test_ctrl_c/start_killer.sh

@@ -0,0 +1,3 @@
+sleep 5
+$maxscale_access_sudo /usr/bin/killall maxscale -s INT
+

maxscale-system-test/test_ctrl_c/test_ctrl_c.sh

@@ -0,0 +1,28 @@
+#!/bin/bash
+
+$maxscale_access_sudo service maxscale stop
+
+hm=`pwd`
+$hm/start_killer.sh &
+if [ $? -ne 0 ] ; then
+        exit 1
+fi
+
+T="$(date +%s)"
+
+$maxscale_access_sudo maxscale -d
+if [ $? -ne 0 ] ; then
+	exit 1
+fi
+
+T="$(($(date +%s)-T))"
+echo "Time in seconds: ${T} (including 5 seconds before kill)"
+
+if [ "$T" -lt 10 ] ; then
+        echo "PASSED"
+        exit 0
+else
+        echo "FAILED"
+        exit 1
+fi
+