Update unittests

Refactor main, unit test, more status info (#911) …
Revert "refactor main, unit test, more status info (#911)" (#917) …
add ctx to Run() (#919) …
conditional json output and enhanced status (#920) …
Accepts JSON and JSONL suffixes for test filenames. (#922)
Refactor main, add unit test (#921) …
Enable GCS json output (#923) …
Uses whole sample for DISCOv2. (#924) …
k8s config to use 7 cpus, to allow mapping to "parser-pool" (#925) …
Remove testdata files with invalid characters in filename (#926) …