Update redis helm chart values

Update to the correct image registry in order to fix
the bug that occured when deploying redis.

Image registry has change from quay.it to docker.io -
explanation - bitnami-labs/sealed-secrets#822

Add image parameters under redis in the Helm chart to allow us to use
a copied image from quay.io to avoid docker.

Fix the replica count to be 1 and not the default which is 3.

Signed-off-by: Ido Burstein <iburstei@redhat.com>

chart/values.yaml

@@ -11,7 +11,7 @@ redis:
   installdep:
     enable: true
   global:
-    imageRegistry: quay.io
+    imageRegistry: docker.io
     redis:
       password:
   clusterDomain: cluster.local
@@ -23,6 +23,7 @@ redis:
     containerSecurityContext:
       runAsUser: null
   replica:
+    replicaCount: 1
     podSecurityContext:
       # readOnlyRootFilesystem: true
       runAsNonRoot: true
@@ -32,6 +33,15 @@ redis:
       runAsNonRoot: true
   service:
     port: 6379
+  image:
+    registry: docker.io
+    repository: bitnami/redis
+    tag: 6.2.6-debian-10-r97
+    ## Specify a imagePullPolicy
+    ## Defaults to 'Always' if image tag is 'latest', else set to 'IfNotPresent'
+    ## ref: https://kubernetes.io/docs/user-guide/images/#pre-pulling-images
+    ##
+    pullPolicy: IfNotPresent
 
 smtp:
   endpoint: