Entourage 1.5 stars Starring Kevin Connolly, Adrian Grenier, Kevin Dillon, Jerry Ferrara, Jeremy Piven. Written and directed by Doug Ellin. 104 minutes. Opening Wednesday at major theatres. 18A Four years ago, band-of-bros in Hollywood series Entourage wrapped up after eight seasons on HBO. That should have been enough for anyone, yet they’re back for a movie…