Fix error log that should be debug in CachedUserService

src/main/java/org/eclipsefoundation/git/eca/service/impl/CachedUserService.java

@@ -122,7 +122,7 @@ public class CachedUserService implements UserService {
      * @return the user account if found by mail, or null if none found.
      */
     private EclipseUser retrieveUser(String mail) {
-        LOGGER.error("Getting fresh user for {}", mail);
+        LOGGER.debug("Getting fresh user for {}", mail);
         // check for noreply (no reply will never have user account, and fails fast)
         EclipseUser eclipseUser = checkForNoReplyUser(mail);
         if (eclipseUser != null) {