Regression tests **scan-build** and **exploded-graph-rewriter** did not support Windows platform, though it seemed they could work well either.
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
Minor fix for exploded-graph-rewriter.py. It did not correctly convert dot to html.
Now all these tests locally pass on Windows. Shall be checked on other platforms.