- Handle case when no files are linted
- Skip deleted files for safe commit script
- Add verbose options for safe commit

- Add rule based thresholds
- Add safecommit to Jenkins

There's no need to use a string literal in setattr, delattr, or the
two-argument form of getattr.

This gets us checking for tests inheriting from other tests.  When that
happens, tests get run more than once, which is pointless.  We have a
few dozen new warnings due to this new check.

This also disables unused-wildcard-import.  That removes a few hundred
warnings.

Together, this means we can reduce the pylint limit to 5999. :)

There are 80 of these new violations in the tree, so up the lint
threshold also.

This complexity metric is created by using radon (see changed files for additional
documentation links). This tool calculates cyclomatic complexity and provides a numeric grade
where a lower number is better (e.g., less complex).

JShint will be executed with paver run_jshint, which will use a defined set of
directories (likewise defined are directories to ignore). A limit can be imposed
on the total number of violations. Note that this change does NOT include adding
jshint to diff-quality or `paver run_quality`.

This reverts commit 52c4aaca.

With the old logic, we weren't running pylint on openedx at all.  We
were also running it on lms/lib/comment_client twice, and on the
installed xblock third-party library.

will fall in 'shard 6'