dvdplayer: selecting bluray input stream instead of dvd based on index.bdmv

dvdplayer: selecting bluray input stream instead of dvd based on index.bdmv

This avoids the attempt to first open it as a dvd then as a bluray by checking
for the existance of BDMV/index.bdmv inside the image.

This drops old and unused BlurayStartingTitle and non checked for
property ?title= stuff for bluray that was a remnant from old
bluray implementation