This makes it possible to run the script locally even if `TRAVIS_PULL_REQUEST` is not set.

Currently, it results in an error:

tools/scripts/ci_build.sh: line 2: [: !=: unary operator expected

This script is intended to identify common test file formatting errors
prior to their acceptance into the project. It is designed to support
future extensions for additional validation rules.

* Update github-deploy-key

* Update deploy.sh