use execvp instead of subprocess for redis-cli
use execvp instead of subprocess for redis-cli

If we handoff the execution to the script we are calling instead of
trying to handle it with subprocess we avoid complex situations to pass
thru signals and such

Signed-off-by: BlackEagle <6c5c99a37e4dd8841971a4b7c7580d6fcba68554@gmail.com>

dockerwest/compose-pimcore,dockerwest/compose-pimcore,BlackIkeEagle/docker-compose-pimcore