[Testrail] universal tool for publishing test results to TestRail

This blueprint is based on https://bugs.launchpad.net/fuel/+bug/1538523

and short description from those LP issue:

It's necessary to report plugin tests results from Jenkins or other source (i.e. xunit reports) to TestRail.
Current sollution doesn't allow to use another sources of test results instead of Jenkins jobs.

1) Current sollution support only jenkins xUnit test results and doesn't support testrail configuration options.
    I see this sollution like:
    [Jenkins xUnit]--\ ................./--[TestRail]
                                  |--[ITRR]--|
    [nosetests.xml]--/ ````````````\--[TestLink, etc]

    This script may convert test result into Internal Test Result Represenation (ITRR) and pass that to the destionation
    tool like TestRail, TestLink, etc.

    so, on the firt step we could add support only TestRail as a destination for testresults.

I've posted the draft for this solution as a different repository here https://github.com/ehles/trep