Introduce Asterisk_Tests testsuite

Add initial infrastructure to run tests against an Asterisk process.
An not-yet-finished draft test doing registration is submitted to
validate communication towards Asterisk works.

The testsuite will be improved in follow-up commits, but this way other
people can already start using it and we can set up the dockerized setup
+ jenkins jobs to run it nightly.

Related: SYS#6782
Change-Id: I66f776d5df6fb5dc488d9e589b84a6b2385406e8
diff --git a/asterisk/expected-results.xml b/asterisk/expected-results.xml
new file mode 100644
index 0000000..c1d9e2e
--- /dev/null
+++ b/asterisk/expected-results.xml
@@ -0,0 +1,4 @@
+<?xml version="1.0"?>
+<testsuite name='Titan' tests='9' failures='0' errors='0' skipped='0' inconc='0' time='MASKED'>
+  <testcase classname='Asterisk_Tests' name='TC_internal_registration' time='MASKED'/>
+</testsuite>