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: I93368266d0ac2223d1e14958dbe199269a6d84a6
Closes-Bug: #1328855