Hi aikam,
I don't think so they will ask 4 re medicals cause your application was in process since Jan 2015 and your medicals got expired in the month of June all this time they should have completed the background check (security, criminality and rfv check) and should have asked for ppr in fact they were sleeping on the file for almost 6 months they probably would be extending your medicals I read an article in cic website regarding re medicals for 2012 though the bulletin has expired at times immigration officer still follows it here is the link
http://www.canadavisa.com/canada-immigration-discussion-board/medical-exam-validity-extension-for-additional-12-months-new-cic-bulletin-t106229.0.html
http://www.cic.gc.ca/english/resources/manuals/bulletins/2012/ob423.asp
Let's see what ndvo does