fix: all sasjs tests should be passing on sas9

[sabhas]

Issue

closes #688

Checks

No PR (that involves a non-trivial code change) should be merged, unless all items below are confirmed! If an urgent fix is needed - use a tar file.

• All sasjs-cli unit tests are passing (npm test).
• (CI Runs this) All sasjs-tests are passing. If you want to run it manually (instructions available here).
• Data Controller builds and is functional on both SAS 9 and Viya