CWMSVUE-751 do not try to authenticate more than once (#300)

* CWMSVUE-751 do not try to authenticate more than once

we want to make sure that the actual unauthorized response is returned rather than getting stuck in an unauthenticated loop

* Autogenerated JaCoCo coverage badge

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Co-authored-by: builduser <builduser@rmanet.com>

Author: adamkorynta

.github/coveragereport/badge_branchcoverage.svg

@@ -49,6 +49,10 @@ final class OAuth2TokenAuthenticator implements Authenticator {
 
     @Override
     public synchronized Request authenticate(Route route, Response response) throws IOException {
+        if(response.priorResponse() != null && response.priorResponse().priorResponse() != null) {
+            //We've already tried to authenticate, we must not have proper credentials;
+            return null;
+        }
         OAuth2Token token = tokenProvider.getToken();
         if (token == null) {
             throw new IOException("Attempt to refresh token failed: No token retrieved from " + OAuth2TokenProvider.class.getName());