[IMP][pylint-conf] Add deprecated modules: pdb, pudb. And enable fails W0402,F0401 to check it

More info here:
https://github.com/OCA/maintainer-quality-tools/issues/112

We need enable 
W0402(deprecated-module) to detect conf
+[IMPORTS]
+deprecated-modules=pdb,pudb
But show fail only if module is installed.

And we need enable 
F0401(import-error)
If you try use deprecated modules without install depends.

And now "import openerp" show a import-error then I add odoo directory to PYTHONPATH to detect this import. 
Why is setting PYHTONPATH needed?