tests: added more required stubbs

reflect recent changes in how external commands are submited to the core.

Signed-off-by: Sven Nierlein <sven@nierlein.de>
added travis ci integration

because more tests are better

Signed-off-by: Sven Nierlein <sven@nierlein.de>
Merge pull request #6 from sni/master

add travis integration