'Ensure non-existent SHA in haves are tolerated'

def test_bogus_haves(self):

    bogus_sha = self.cmt(2).id[::(-1)]
    haves = [self.cmt(1).id, bogus_sha]
    wants = [self.cmt(3).id]
    self.assertMissingMatch(haves, wants, self.missing_1_3)
