You dont need to configure that address in junos devices. The 127.0.0.0 is just a network address; actaully within that network we could find addresses like 127.0.0.1 which is configured on the SRX by default:
root@a13-17> show interfaces terse lo0
Interface Admin Link Proto Local Remote
lo0 up up
lo0.16384 up up inet 127.0.0.1 --> 0/0
lo0.16385 up up inet
Find more info here: https://www.howtogeek.com/149227/whats-the-difference-between-127.0.0.0-and-127.0.0.1/
In short you dont need to configure the 127.0.0.0 for enabling any funtionalities on the SRX.