Hardcoded values in envconfigmap.yaml

[zarvai-fea]

Some values are not used from installation parameters, but have been hardcoded in the templates/envconfigmap.yaml:

OWNCLOUD_REDIS_ENABLED: "true"
OWNCLOUD_SKIP_CHOWN: "true"

[zarvai-fea]

Chown is already have an issue #77