'Installs AccessControlManager and stubs out SendEmail.'

def InstallACLChecks(self):

    acrwac = api_call_router_with_approval_checks
    acrwac.ApiCallRouterWithApprovalChecksWithRobotAccess.ClearCache()
    if self.config_override:
        return
    name = acrwac.ApiCallRouterWithApprovalChecksWithRobotAccess.__name__
    self.config_override = test_lib.ConfigOverrider({'API.DefaultRouter': name})
    self.config_override.Start()
    api_auth_manager.APIACLInit.InitApiAuthManager()
