Although primarily a human readable script, it is quite useful
to return success or failure from this script so it can be used
as a basic test.
Fail if any check fails, including some that are optional,
other than the storage driver tests, where only one needs to
succeed, so the system has at least one workable storage driver.
Signed-off-by: Justin Cormack <justin.cormack@docker.com>
Upstream-commit: 6d116ffbbbc597994855f1b6fe86af324ac649de
Component: engine
74c006a5ce