fixed bug in term processing

routingtable/filter/BUILD.bazel

routingtable/filter/action.go

routingtable/filter/actions/BUILD.bazel

routingtable/filter/actions/accept_action.go

routingtable/filter/actions/action.go

routingtable/filter/actions/add_community_action.go

routingtable/filter/actions/add_community_action_test.go

routingtable/filter/actions/add_large_community_action.go

...ngtable/filter/actions/add_large_community_action_test.go

routingtable/filter/actions/as_path_prepend_action.go

routingtable/filter/actions/as_path_prepend_action_test.go

routingtable/filter/actions/reject_action.go

routingtable/filter/actions/set_local_pref_action.go

routingtable/filter/actions/set_local_pref_action_test.go

routingtable/filter/actions/set_nexthop_action.go

routingtable/filter/actions/set_nexthop_action_test.go

routingtable/filter/filter.go

routingtable/filter/filter_test.go

routingtable/filter/helper.go

routingtable/filter/term.go