Merge pull request #101 from serlo/upgrade-redis #329

Job	Run time
fmt	9s
validate (envs/production)	15s
validate (envs/staging)	24s
validate (modules/api)	11s
validate (modules/cloudflare)	10s
validate (modules/dbdump)	10s
validate (modules/dbsetup)	15s
validate (modules/enmeshed)	11s
validate (modules/gcloud/cluster)	11s
validate (modules/gcloud/gcloud_dbdump_reader)	13s
validate (modules/gcloud/gcloud_dbdump_writer)	11s
validate (modules/gcloud/gcloud_mysql)	13s
validate (modules/gcloud/gcloud_postgres)	13s
validate (modules/hydra)	15s
validate (modules/ingress)	12s
validate (modules/ingress-nginx)	13s
validate (modules/kratos)	12s
validate (modules/redis)	10s
validate (modules/rocket-chat)	15s
validate (modules/tls-self-signed-cert)	12s
	4m 15s

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