We'll not be backporting this fix to the 3.7 image given the regression risks.
Running the 3.9 image against either a 3.6 or 3.7 openshift master are viable because:
- the rest client used by the sync plugin has not changed between those releases, it can talk to 3.6
- for the client plugin, you can use the global configuration tool to import either the 3.6 or 3.7 version of oc as needed
- the oauth api for the login plugin has stayed constant across those relelase