Allow specifying custom group name when validating files from stdin #1095
Description
Summary
When used with kustomize (as per example), produced output looks like:
kustomize build . | conftest test - -p policy/conftest
FAIL - - main - Failure message
8 tests, 7 passed, 0 warnings, 1 failure, 0 exceptions
This makes it hard to locate the failure. Would be nice to have a cli flag which will allow to override the group name to some custom value instead.