Removed extra Murano OSTF tests

We have significant changes in Murano for Fuel 5.x versions
and we disabled all Windows-based OSTF tests for Murano, new version
of Murano doesn't required these tests, need to clear the code.

Change-Id: If718340f09945b02e40a27f91c9c2cd1f7cb6316
Closes-Bug: #1328855
Merge "Removed extra Murano OSTF tests"