[REM,IMP]:Remove openerp/report/pyPdf

Hello,

I have done following changes .
    1. Removing pyPdf .
    2. Fixing the cursor/environment stuff in RML pdf (deprecated) report.

More details:

Task link :- https://openerp.my.openerp.com/web#id=9120&view_type=form&model=project.task&menu_id=3942&action=327
Pad link :- https://pad.odoo.com/p/r.83pH7GnykB0Zlwm8

Thanks,
Sunil Sharma (ssh-odoo)