Add VersionID to impl/memory info service implementation
Add VersionID to impl/memory info service implementation

R=dnj@chromium.org, estaab@chromium.org, maruel@chromium.org, tandrii@chromium.org, vadimsh@chromium.org
BUG=

Review URL: https://codereview.chromium.org/1403873002

luci/luci-go,luci/luci-go,luci/luci-go,luci/luci-go,luci/luci-go,luci/luci-go