GET /containers/json route used to reply with and empty array `[]` when no
containers where available. Daemon containers list refactor introduced
this bug by declaring an empty slice istead of initializing it as well
and it was now replying with `null`.
Signed-off-by: Antonio Murdaca <runcom@linux.com>
Upstream-commit: 26bd5e3a2da3157f0bcb6654c30b6eccedf7f3f3
Component: engine