removed test envars section, changed CHANGE_BRANCH to GIT_BRANCH when sensible (CHANGE_BRANCH is only set on PRs)
removed test envars section, changed CHANGE_BRANCH to GIT_BRANCH when sensible (CHANGE_BRANCH is only set on PRs)

empirical-org/Empirical-Core,empirical-org/Empirical-Core,empirical-org/Empirical-Core,empirical-org/Empirical-Core,empirical-org/Empirical-Core,empirical-org/Empirical-Core,empirical-org/Empirical-Core