Reserved resources variable name will not work after the SECURITY-170 update so you need to use the workaround (-Dhudson.model.ParametersAction.safeParameters)

log :
May 16, 2016 10:32:48 AM hudson.model.ParametersAction filter
WARNING: Skipped parameter `Test` as it is undefined on `test_lock`. Set `-Dhudson.model.ParametersAction.keepUndefinedParameters`=true to allow undefined parameters to be injected as environment variables or `-Dhudson.model.ParametersAction.safeParameters=[comma-separated list]` to whitelist specific parameter names, even though it represents a security breach
May 16, 2016 10:32:48 AM hudson.model.ParametersAction filter
WARNING: Skipped parameter `Test` as it is undefined on `test_lock`. Set `-Dhudson.model.ParametersAction.keepUndefinedParameters`=true to allow undefined parameters to be injected as environment variables or `-Dhudson.model.ParametersAction.safeParameters=[comma-separated list]` to whitelist specific parameter names, even though it represents a security breach
May 16, 2016 10:35:19 AM winstone.Logger logInternal