Remove double negative in factory resolution check

Author: poojanilangekar

runtime/service/src/main/java/org/apache/polaris/service/catalog/iceberg/IcebergCatalogHandler.java

@@ -222,7 +222,7 @@ protected void initializeCatalog() {
       Instance<ExternalCatalogFactory> externalCatalogFactory =
           externalCatalogFactories.select(
               Identifier.Literal.of(connectionType.getFactoryIdentifier()));
-      if (!externalCatalogFactory.isUnsatisfied()) {
+      if (externalCatalogFactory.isResolvable()) {
         federatedCatalog =
             externalCatalogFactory
                 .get()