Feature #2193: write osmo-gsm-tester test cases and extend tester API
osmo-gsm-tester: add test case: data test API
add API to use data services.
- connect/disconnect (?)
- query a given URL
After discussion with Harald, at least 2 tests would be nice:
1- ping test: with big delay in between pings to let the TBF be released and grabbed again.
2- HTTP/TCP test: Try downloading a webpage of hundreds KB and check the TCP connection doesn't break and all data can be safed correctly.