This allows
cd tests && python $CREW/tests/run-tests.py -j7 --extra-config-opt devel.all-warnings=no --blacklist=<(ls test*lfs*.t test*fastanno*.t) test*remotefilelog*.t
to pass when $CREW points to a clone of hg 4.7. IOW, the remotefilelog
functionality that Google cares about now works against 4.7. I'll work
on compatibility with tip next.
The hgXY test capabilities are defined with modern versions of hghave.py. So this could be written as e.g (hg47 !) to make it conditional on >= 4.7.