'Vanderpump Rules' Star Stassi Schroeder -- She's Finished ... Due to Excessive B.A.

"Vanderpump Rules" star Stassi Schroeder was a blast during the first 2 seasons, but the Queen V herself says the party's over for Stassi because her bad attitude through Season 3 was just too much.  Lisa Vanderpump tells TMZ Stassi is…