Python linter: reinstate passing --rcfile to pylint, and add tests to verify it works.
http://bugs.activestate.com/show_bug.cgi?id=101777
r=toddw
rn=

(integrated from komodo (trunk) change 83363 by ericp)

git-svn-id: http://svn.openkomodo.com/repos/openkomodo/trunk@14094 b87d16e7-d29f-4ee1-b5ec-817d645d335f