Revert "[REF][pylint-conf] Fix issue #109 (but ignore E1101 fail)"

Reverts OCA/maintainer-quality-tools#127

Which breaks all manner of tests.

https://travis-ci.org/OCA/server-tools/jobs/40852402

#127 should have been more roughly reviewed before merging.

In fact I would suggest MQT should meet higher amount of reviews than any other repo. Two are not enough.