Thanks a lot. Please also let me know, if it is advisable to send to EE exactly same documents which I sent to OINP.Congratulations! First accept the ITA, then submit a request to withdraw your OINP application.
From page 8 of the application instructions PDF:
http://www.ontarioimmigration.ca/prodconsum/groups/csc/@oipp/documents/document/oi_en_hcps_010517.pdf
Note: If you receive and accept an Invitation to Apply (ITA) from IRCC or a nomination from another province or territory after you have already applied to OINP, the OINP is unable to continue processing your application. You must submit a request to withdraw your application with the OINP. Your application fee will not be refunded if the OINP has started processing your application. Application fees are non-refundable if processing has already begun, as they cover OINP’s cost of processing applications.