ensure not nulls on test sql file for content version FKs

Author: jclausen

tests/resources/sql/mysql/contentbox.sql

@@ -471,8 +471,8 @@ CREATE TABLE `cb_contentVersion` (
   `modifiedDate` datetime NOT NULL,
   `isDeleted` bit(1) NOT NULL DEFAULT b'0',
   `contentVersionID` varchar(36) NOT NULL,
-  `FK_authorID` varchar(36) DEFAULT NULL,
-  `FK_contentID` varchar(36) DEFAULT NULL,
+  `FK_authorID` varchar(36) DEFAULT NOT NULL,
+  `FK_contentID` varchar(36) DEFAULT NOT NULL,
   PRIMARY KEY (`contentVersionID`),
   UNIQUE KEY `id` (`contentVersionID`),
   UNIQUE KEY `contentVersionID` (`contentVersionID`),