orchestrator-k8s: More values.yaml updates and fixes

[rgolangh]

• have a default value for GH provider client id and secret
• bump orchestrator plugin to latest releases after 32 days of no releases.
• add events dynamic plugin (notifications dependency)

Signed-off-by: Roy Golan rgolan@redhat.com

[masayag]

@rgolangh must bump version for changes to be released