Set up github CI kokoro job

TESTED=Set up the job in kokoro-qa:

[]

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=166875896

java/google/registry/export/sheet/BUILD

@@ -8,6 +8,7 @@ java_library(
     name = "sheet",
     srcs = glob(["*.java"]),
     deps = [
+        "//java/com/google/gdata:spreadsheet",
         "//java/google/registry/config",
         "//java/google/registry/model",
         "//java/google/registry/request",