updated: SpannerSource schema to match import query#523

bajram-adapt wants to merge 1 commit intodata-integrations:release/0.15data-integrations/google-cloud:release/0.15from

AdaptiveScale:cherrypick/release-0.15/plugin-296AdaptiveScale/google-cloud:cherrypick/release-0.15/plugin-296Copy head branch name to clipboard