don't skip 'pylint' target on slave when master fails

On 'make pylint' make sure pylint target is run in both 'master' and
'slave' directories. Previously, the pylint target in 'slave' was
skipped if any errors where reported for 'master'.
disable some pylint 1.0.0 checks for now

Disable new failing checks that were introduced in pylint
1.0.0 release. To be fixed an enabled in the future.
Merge branch 'pylint-1.0.0' of git://github.com/elmirjagudin/buildbot