Avoid using identical name for input and output imagestream

Description of problem: Avoid using identical name for input and output imagestream. The below build triggers itself when it finishes and continues in a loop.

$ oc new-build -D $'FROM registry.redhat.io/ubi8/ubi' --to=ubi:latest

Version-Release number of selected component (if applicable):
v4u11

How reproducible:

Steps to Reproduce:
1. Create a build
$ oc new-build -D $'FROM registry.redhat.io/ubi8/ubi' --to=ubi:latest
2. It triggers itself when it finishes
3.

Actual results:
It does not throw any error.

Expected results:
It should give an error to use different build name.

Additional info:
https://github.com/openshift/oc/pull/1107