Returns a neighbor in_filter for given ip address if exists.

def set_neighbor_in_filter(neigh_ip_address, filters):
    """Returns a neighbor in_filter for given ip address if exists."""
    core = CORE_MANAGER.get_core_service()
    peer = core.peer_manager.get_by_addr(neigh_ip_address)
    peer.in_filters = filters
    return True