This bug was initially created as a copy of Bug #1845817

I am copying this bug because: 



Description of problem:
on EtcdBackup creation form, 'AWS Secret' descriptor always shows a loading ... icon until user select one secret from dropdown

Version-Release number of selected component (if applicable):
    4.5.0-0.nightly-2020-06-09-201617

How reproducible:
Always

Steps to Reproduce:
1. subscribe etcd operator and wait until successfully subscribed
2. create EtcdBackup instance via Operators -> Installed Operators -> etcd -> click on 'etcd Backup' -> click 'Create EtcdBackup' button


Actual results:
2. the 'AWS Secret' dropdown always shows loading ... until user select one secret from dropdown
          - description: >-
              The name of the secret object that stores the AWS credential and
              config files.
            displayName: AWS Secret
            path: s3.awsSecret
            x-descriptors:
              - 'urn:alm:descriptor:io.kubernetes:Secret'


Expected results:
2. If secrets are loaded completely, we should not show a loading icon ... any more

Additional info: