Get pylint running on all modules again

rakefile

@@ -66,9 +66,13 @@ end
     desc "Run pylint on all #{system} code"
     task "pylint_#{system}" => report_dir do
         Dir["#{system}/djangoapps/*", "#{system}/lib/*"].each do |app|
-            ENV['PYTHONPATH'] = File.dirname(app)
+            if File.exists? "#{app}/setup.py"
+                pythonpath_prefix = "PYTHONPATH=#{app}"
+            else
+                pythonpath_prefix = "PYTHONPATH=#{File.dirname(app)}"
+            end
             app = File.basename(app)
-            sh("pylint --rcfile=.pylintrc -f parseable #{app} | tee #{report_dir}/#{app}.pylint.report")
+            sh("#{pythonpath_prefix} pylint --rcfile=.pylintrc -f parseable #{app} | tee #{report_dir}/#{app}.pylint.report")
         end
     end
     task :pylint => "pylint_#{system}"