[ADD] pylint_oca: Add pylint plugin script to check OCA guidelines

[moylop260]

• Add new feature to check odoo guidelines with a pylint-plugin.
  • Add compatibility to check manifest file __openerp__.py
  • New checks available for all versions just in modules changed:
    • C8101 - Missing author required "%s" in manifest file - manifest-required-author
      • Odoo Community Association (OCA)
    • C8102 - Missing required key "%s" in manifest file - manifest-required-key
      • license
    • C8103 - Deprecated key "%s" in manifest file - manifest-deprecated-key
      • description and active except for odoo <= 70
    • C8201 - No UTF-8 coding found: Use # -*- coding: utf-8 -*- - no-utf8-coding-comment
    • E7901 - RST syntax error %s - rst-syntax-error
    • W7901 - Dangerous filter without explicit user_id in xml_id %s - dangerous-filter-wo-user
    • W7902 - Duplicate xml record id %s - duplicate-xml-record-id
    • W8101 - Detected api.one and api.multi decorators together. - api-one-multi-together
    • W8201 - Incoherent interpreter comment and executable permission. Interpreter: [%s] Exec perm: %s - incoherent-interpreter-exec-perm
    • W8202 - Use of vim comment - use-vim-comment
  • New checks available for all versions except for odoo <= 70 in modules changed:
    • C7902 - Missing ./README.rst file. Template here: %s - missing-readme
    • C8104 - Use CamelCase "%s" in class name "%s". You can use oca-autopep8 of https://github.com/OCA/maintainer-tools to auto fix it. - class-camelcase
    • R8101 - Import Warning should be renamed as UserError from openerp.exceptions import Warning as UserError - openerp-exception-warning
    • W8102 - Missing api.one in copy function. - copy-wo-api-one

%s is extracted from config_file.

Example of comments:

• Missing license key:
  • https://github.com/OCA/runbot-addons/pull/11/files#r34793801
• Change encoding by coding
  • [ADD] webhook: Add standard webhook odoo module server-tools#193 (comment)
• Use Readme.rst file:
  • https://github.com/OCA/stock-logistics-workflow/pull/64/files#r24239000
• CamelCase:
  • [ADD] new module crm_claim_product_supplier to filled supplier and in… rma#36 (comment)
• OCA author:
  • 8.0 base field validator server-tools#246 (comment)

Example result:

[moylop260]

@nhomar @pedrobaeza
Could you merge it?

[nhomar]

2 +1 then I merge.