[ADD] except-pass: New check to detect sentence "pass" in exceptions catched

[moylop260]

try:
  sentences
except:
  pass  # emit message

A good justification of this case is: http://stackoverflow.com/a/21553825

This is a new guideline then

• [x] Add documentation creating PR to https://github.com/OCA/maintainer-tools/blob/master/CONTRIBUTING.md in order to get feedback from community.
• [ ] Create a PR for pycqa/pylint to check if is a good idea for the maintainer
• [x] if is not good idea for pycqa/pylint then create it for vx/pylint-odoo
• [ ] After merge vx/pylint-odoo migrated to oca/pylint-odoo. https://github.com/Vauxoo/pylint-odoo/issues/106

[JesusZapata]

Done! But it was rejected! https://github.com/PyCQA/pylint/pull/1261 The documentation in! https://github.com/OCA/maintainer-tools/pull/252

[JesusZapata]

@moylop260 I made a PR for third item of checklist https://github.com/Vauxoo/pylint-odoo/pull/106

[moylop260]

WIP from https://github.com/OCA/pylint-odoo/pull/107