Master until 2023-10-17
Merge pull request #66 from mukulga/xalan-j_master_mukul

committing minor changes to xalanj README file, as per the following change that was done earlier : movement of the 2.7.3_release test cases to jira directory. also making a minor improvement to error handling within xalanj implementation codebase, when variables were not been resolved within an xslt 1.0 stylesheet.