Handling added for JSON with top level array

When using serialize mode in a JSON data transform where the Top element structure was Array and the “For JSON only” relation was selected for relation mode, the result had an incorrect JSON structure. In order to support this configuration, generatePropertyAsJSON has been amended to set isTopLevelPageList to true in instances where automap is off, the top level is an array, and the JSON context is updated within the first step. In addition, generatePageAsJSON has been updated to check this flag when processing mappings in order to ensure these context changes are processed, and updates have been made to generatePropertyAsJSON to ensure that the context is popped when appropriate.