Lisa Vanderpump was not entirely surprised by Jax Taylor and Brittany Cartwright’s split. After theVanderpump Rules alums announced their separation after four years of marriage, their former boss, 63, seemed to think the demise of their love had nothing to do with the southern belle, 35. “I don’t know what the reason was,” Vanderpump said when asked about the breakup. “But I imagine it was probably something to do with Jax’s bad behavior. I’m not sure, but the indicator of future behavior is normally past behavior.” “Everybody predicted that when they got married,” she added. “They said, ‘Oh …