Add order field to GqlMetadataFieldInterface

The order field is required to display the metadata fields in the
desired order.

modules/graphql/src/main/java/org/opencastproject/graphql/type/output/GqlMetadataFieldInterface.java

@@ -72,4 +72,9 @@ default String collectionId() {
     return getMetadataField().getCollectionID();
   }
 
+  @GraphQLField
+  default Integer order() {
+    return getMetadataField().getOrder();
+  }
+
 }

modules/graphql/src/main/java/org/opencastproject/graphql/type/output/field/GqlJsonMetadataField.java

@@ -45,46 +45,6 @@ public MetadataField getMetadataField() {
     return metadataField;
   }
 
-  @GraphQLField
-  public String outputId() {
-    return getMetadataField().getOutputID();
-  }
-
-  @GraphQLField
-  public String inputId() {
-    return getMetadataField().getInputID();
-  }
-
-  @GraphQLField
-  public String label() {
-    return getMetadataField().getLabel();
-  }
-
-  @GraphQLField
-  public MetadataField.Type type() {
-    return getMetadataField().getType();
-  }
-
-  @GraphQLField
-  public boolean readOnly() {
-    return getMetadataField().isReadOnly();
-  }
-
-  @GraphQLField
-  public boolean required() {
-    return getMetadataField().isRequired();
-  }
-
-  @GraphQLField
-  public String listProvider() {
-    return getMetadataField().getListprovider();
-  }
-
-  @GraphQLField
-  public String collectionId() {
-    return getMetadataField().getCollectionID();
-  }
-
   @GraphQLField
   @GraphQLType(JsonFunction.class)
   public Object value() {