Fix Deployer.to_s during a security release
BaseProject.to_s
will invoke BaseProject#security_path
during a security
release, but projects on ops, like the Deployer, have no security
remote.
This commit overrides Deployer.to_s
to only invoke path.
Closes https://gitlab.com/gitlab-org/release-tools/issues/360
Edited by Alessio Caiazza