- implements feature display detail error and failure messages for test cases

Now the error and failure stacktraces will be parsed from the upload unit report file
and stored in the message table. The api returns now also this stacktraces.

See https://trello.com/c/mYkVPoWS
- added end 2 end test case for the test case page

Added complete missing end 2 end test for the test case page and
added also tests that check if the stacktraces of error or failures
shown properly.

See https://trello.com/c/xULR3HtQ
- fixed test failure

Changed some test data for the end to end test and forget to adapt
the E2ETestGlobalSpec which check thet the test data for end to end
are valid.