GitHub oAuth authorization does not work with Red Hat SSO 7.3

[dmytro-ndp]

Description

It's impossible to authorize with GitHub oAuth using Red Hat SSO registry.access.redhat.com/redhat-sso-7/sso73-openshift:1.0-11

Reproduction Steps

Steps to reproduce:

• deploy Eclipse Che using Red Hat SSO 7.3 from registry.access.redhat.com/redhat-sso-7/sso73-openshift:1.0-11
• add Github identity provider to Red Hat SSO
• create new user
• create workspace and open IDE
• go to Profile -> Preferences -> VCS
• click on the button Generate Key and try to upload ssh key by clicking on OK button

Expected behavior:

• there is GitHub authorization page with correct content opened, for example:
  

Observed behavior:

• there was Invalid Request error page appeared:
  

Downstream issue:
https://issues.jboss.org/browse/CRW-281

OS and version:
Eclipse Che 6.19.3 deployed to OpenShift 3.11 with Keycloak

Diagnostics:

[skabashnyuk]

@dmytro-ndp to be able to identify this issue is a bug - can you confirm that redhat-sso-7/sso73-openshift:1.0-11 is based on jboss/keycloak-openshift:3.4.3.Final that is certified in upstream?

[dmytro-ndp]

According to fixed issues list SSO 7.3 based on Keycloak of up to 4.8.0 version jboss/keycloak-openshift:4.8.0.Final.

[dmytro-ndp]

Commit 239d93e is fixing downstream issue https://issues.jboss.org/browse/CRW-281