Execute log analytics tests on Travis

[tsteur]

See #7059

I think we should run the log importer tests on travis automated even if it takes one job. To execute them it won't take long. Just executed them locally and getting this error:

..Fatal error: cannot automatically determine the log format using the first 100000 lines of the log file. 
Maybe try specifying the format with the --log-format-name command line argument.

We could maybe even move the log importer into another repository. Configure travis-yml with sudo:true etc. so execution should very fast. Maybe we could also run the tests on windows?

Migrated from matomo-org/matomo#7062