make opendolphin and integration tests more reliable

[timo0]

Currently the opendolphin tests run often in time-out exceptions with no reason. Most of the time retriggering solves the problem.

Regarding the integration tests here we run in endless long-poll with no reason as well.

Both should be solved to get better results from the build

[hendrikebbers]

Integration test problem is fixed by https://github.com/canoo/dolphin-platform/pull/770