ttcn3: run ttcn3 testsuites from osmo-dev

Build testsuite, SUT and dependencies and run everything with one
command. Example usage:

$ ./ttcn3/ttcn3.sh msc

So far, it works at least with:
hlr, mgw, msc, pcu, pcu-sns, sgsn

Change-Id: I6b4bf2743adeec1a950d5f090a690182b991cf49
7 files changed