re-organize configuration files; add tcpdump integration

Let's make sure we share common configuration between the test
suites and split the config file into a "default" part which is
used (but not copied) in the Docker images, and a "local" part
which is basically those overrides that the user (or docker image)
wants to do from the default.

Change-Id: I3db452e24e5238aa05254d903739c64d202e61db
diff --git a/Common.cfg b/Common.cfg
new file mode 100644
index 0000000..4a50420
--- /dev/null
+++ b/Common.cfg
@@ -0,0 +1,17 @@
+# common config file, relevant to all projects
+
+[DEFINE]
+TTCN3_HACKS_PATH := ".."
+TCPDUMP_START := $TTCN3_HACKS_PATH"/ttcn3-tcpdump-start.sh"
+TCPDUMP_STOP := $TTCN3_HACKS_PATH"/ttcn3-tcpdump-stop.sh"
+
+[LOGGING]
+SourceInfoFormat := Single;
+LogSourceInfo := Yes;
+LoggerPlugins := { JUnitLogger := "libjunitlogger2" }
+#FileMask := LOG_ALL | TTCN_DEBUG | TTCN_MATCHING | DEBUG_ENCDEC;
+#ConsoleMask := ERROR | WARNING | TESTCASE | TTCN_MATCHING | DEBUG_ENCDEC
+
+[EXTERNAL_COMMANDS]
+BeginTestCase := $TCPDUMP_START
+EndTestCase := $TCPDUMP_STOP