Database initialisation failing

Hi,

When I run make test, I get two errors:

starting mattermost-mysql
Unable to find image 'mysql:5.7' locally

and

starting mattermost-postgres
Unable to find image 'postgres:9.4' locally

I believe this issue is causing the command "godep go run mattermost.go -create_team -team_name="name" -email="user@example.com"" to fail

Any tips would be appreciated.

thanks