Allow DELETE via PATCH/UPDATE operation too

Author: MilosKozak

lib/api3/generic/update/validate.js

@@ -19,7 +19,7 @@ function validate (opCtx, doc, storageDoc, options) {
   const { isPatching, isDeduplication } = options || {};
 
   const immutable = ['identifier', 'date', 'utcOffset', 'eventType', 'device', 'app',
-    'srvCreated', 'subject', 'srvModified', 'modifiedBy', 'isValid'];
+    'srvCreated', 'subject', 'srvModified', 'modifiedBy'];
 
   if (storageDoc.isReadOnly === true || storageDoc.readOnly === true || storageDoc.readonly === true) {
     return opTools.sendJSONStatus(res, apiConst.HTTP.UNPROCESSABLE_ENTITY,
@@ -45,4 +45,4 @@ function validate (opCtx, doc, storageDoc, options) {
   return opTools.validateCommon(doc, res, { isPatching });
 }
 
-module.exports = validate;
+module.exports = validate;