Add retry to Trigger integrationtests #831
Description
Currently the trigger tests for non-C# languages are failing at random - often times 2-3 tests failed a day. The root cause is due to messages from the function being dropped and never output from func.exe (which our tests depend on for validation that the function executed correctly).
While we work with the AF team on the root issue itself, a temporary workaround can be to add a retry for trigger tests so that they only fail completely if they fail 3 times in a row.
Even though the failures only seem to happen for non-C# languages we might as well add in the retry for all trigger tests just to simplify things - this is just a temporary workaround so will be removed later (hopefully) so it doesn't need to be perfect and most of the tests should only run one time anyways.