packagemanager: add unit tests (#902)
packagemanager: add unit tests (#902)


mesosphere/dcos-cli,kensipe/dcos-cli,kensipe/dcos-cli,dcos/dcos-cli,kensipe/dcos-cli,kensipe/dcos-cli,mesosphere/dcos-cli,dcos/dcos-cli,dcos/dcos-cli,dcos/dcos-cli,kensipe/dcos-cli,mesosphere/dcos-cli,dcos/dcos-cli