refactor(job): Drop Job.UnitHash field
etcd-client: return a clearer error on action timeout
Merge pull request #596 from jonboulle/timeout

etcd-client: return a clearer error on action timeout
Merge pull request #599 from bcwaldon/drop-UnitHash

refactor(job): Drop Job.UnitHash field
job: make TargetState field a value, not ptr