Update googleapis to official repo (#621)

Author: qiwzhang

repositories.bzl

@@ -588,11 +588,9 @@ cc_proto_library(
         name = "googleapis_git",
         build_file_content = BUILD,
         patch_cmds = ["find . -type f -name '*BUILD*' | xargs rm"],
-        strip_prefix = "googleapis-33602a3174cc7b5d1726aebed4836c3bd7725469",  # forked with rollout_id
-        # TODO(qiwzhang): use forked repo with manually added service_rollout_id field
-        # Switch over once googleapis repo has the latest proto files.
-        url = "https://github.com/qiwzhang/googleapis/archive/33602a3174cc7b5d1726aebed4836c3bd7725469.tar.gz",
-        sha256 = "fa1274fe2d5b59e957be2a63edf2b4c058b1c3e228857e9724cd51c8f374873c",
+        strip_prefix = "googleapis-32a10f69e2c9ce15bba13ab1ff928bacebb25160",  # May 20, 2019
+        url = "https://github.com/googleapis/googleapis/archive/32a10f69e2c9ce15bba13ab1ff928bacebb25160.tar.gz",
+        sha256 = "6861efa8619579e06e70dd4765cdf6cef1ecad6a1a2026ad750541e99552bf71",
     )
 
     if bind: