Add generated file

This PR adds generated files under pkg/client and vendor folder.

vendor/github.com/googleapis/gnostic/plugins/gnostic-analyze/README.md

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+# gnostic-analyze
+
+This directory contains a `gnostic` plugin that analyzes an OpenAPI description for factors
+that might influence code generation and other API automation.
+
+The plugin can be invoked like this:
+
+	gnostic bookstore.json --analyze_out=.
+
+This will write analysis results to a file in the current directory.
+Results are written to a file named `summary.json`.
+
+The plugin can be applied to a directory of descriptions using a command 
+like the following:
+
+	find APIs -name "swagger.yaml" -exec gnostic --analyze_out=analysis {} \; 
+
+This finds all `swagger.yaml` files in a directory named `APIs` and its subdirectories
+and writes corresponding `summary.json` files into a directory named `analysis`.
+
+Results of multiple analysis runs can be gathered together and summarized
+using the `summarize` program, which is in the `summarize` subdirectory.
+Just run `summarize` in the same location as the `find` command shown above.