gradle plugin: Target a specific gradle version: gradle 2.0
gradle plugin: Target a specific gradle version: gradle 2.0

The bnd gradle plugin should target a specific gradle version rather than
just the version of gradle used to compile bnd.

Signed-off-by: BJ Hargrave <3d26bb3930946e3370762d769a073cece444c2d8@bjhargrave.com>

joansmith/bnd,lostiniceland/bnd,lostiniceland/bnd,magnet/bnd,GEBIT/bnd,mcculls/bnd,mcculls/bnd,psoreide/bnd,psoreide/bnd,joansmith/bnd,GEBIT/bnd,mcculls/bnd,xtracoder/bnd,magnet/bnd,xtracoder/bnd,lostiniceland/bnd,psoreide/bnd,magnet/bnd