[Chaos] Initial commit for Chaos App

Initial commit for Chaos AP Datastore.

BUG=None
TEST= Run devapp_server.py app.yaml for local instance of datastore.

Change-Id: Ifeb7d454e966168082e1c5d6de31f3c4737cd79d
Reviewed-on: https://chromium-review.googlesource.com/915125
Commit-Ready: Ruchi Jahagirdar <rjahagir@chromium.org>
Tested-by: Ruchi Jahagirdar <rjahagir@chromium.org>
Reviewed-by: Harpreet Grewal <harpreet@chromium.org>
Reviewed-by: Ruchi Jahagirdar <rjahagir@chromium.org>
5 files changed