flimflam-test: Fix last pylint errors

Mark a bunch of method parameters as unused to pass static checks.
Properly throw NotImplementedErrors for abstract methods, and redefine
the abstract method for the static checker.

I've disabled the checks for whether the unary '=' has spaces around it
so that these default parameters don't fail.  Apparently in this area,
pylint differs from PEP8.

TEST=No Pylint errors

Change-Id: Ia6cfb95a223912b586689559928fc00eb319b1da
Reviewed-on: https://gerrit.chromium.org/gerrit/42348
Reviewed-by: Thieu Le <thieule@chromium.org>
Commit-Queue: Christopher Wiley <wiley@chromium.org>
Tested-by: Christopher Wiley <wiley@chromium.org>
2 files changed