Change deployManagedUAT to optionally use BUILD_COMMIT and
PACKAGE_VERSION environment variables instead of calling out to
mrbelvedere for latest version
Uncomment deletes
Merge pull request #516 from SalesforceFoundation/feature/487-managed-beta-package-per-commit

Feature/487 managed beta package per commit
Merge dev into feature/472-ant-deploy-default-opp-bp-rt