Regression tests scan-build and exploded-graph-rewriter was tagged as not supporting Windows platform. The actual reason was that nobody checked that fact before running test on Windows. But the tests looks like they can work well relying on the way they are written.
Removed tag UNSUPPORTED from scan-build tests.
Removed tag UNSUPPORTED from exploded-graph-rewriter tests.
Fixed path to exploded-graph-rewriter.py in local.cfg.
Fixed JsonSupport in terms of handling Windows specific path delimiters.
Now all these tests locally pass on Windows. Shall be checked on other platforms.