DRILL-7993: LGTM Code Cleanup-Fixed Javadoc param tags and type conversions (#2310)
* fixed some @param tags
and type conversions
* added descriptions for javadoc param tags
* added descriptions for javadoc param tags
* eliminated errors for unknown links in javadocs
* added descriptions for Javadoc param and return tags
* added descriptions for Javadoc param tags
* added descriptions for Javadoc param and return tags
* added descriptions for Javadoc param and return tags, fixed broken links
