Look Crabs

Results 3 issues of Look Crabs

## Description When trying to run src-cli I get an obtuse error: ``` $ SRC_ENDPOINT="https://sourcegraph.host" SRC_ACCESS_TOKEN="XYXYXYXYXYXYXYXY" src batch preview -v -f replace-bugs.batch.yaml ❌ Error: exit status 125 💡 The troubleshooting...

* Add trufflehog snippet to .travis.yml file * Add initial whitelist.

Implemented CLOPS-235 ### Improvements - Enables Trufflehog Travis checks for credentials