Fix cachekey comparisons of param maps to null check

core/src/main/java/org/eclipsefoundation/core/service/impl/QuarkusCachingService.java

@@ -15,6 +15,7 @@ import javax.ws.rs.core.MultivaluedMap;
 import org.eclipse.microprofile.config.inject.ConfigProperty;
 import org.eclipsefoundation.core.namespace.MicroprofilePropertyNames;
 import org.eclipsefoundation.core.service.CachingService;
+import org.jboss.resteasy.specimpl.MultivaluedMapImpl;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -50,7 +51,8 @@ public class QuarkusCachingService implements CachingService {
             Callable<? extends T> callable) {
         Objects.requireNonNull(callable);
 
-        ParameterizedCacheKey cacheKey = new ParameterizedCacheKey(rawType, id, params);
+        ParameterizedCacheKey cacheKey = new ParameterizedCacheKey(rawType, id,
+                params != null ? params : new MultivaluedMapImpl<>());
         LOGGER.debug("Retrieving cache value for '{}'", cacheKey);
         return Optional.ofNullable(get(cacheKey, callable));
     }