[DCAEGEN2-SERVICES] Update chart with service account

Add service account to requirements, values and deployment/statefulset

Issue-ID: OOM-2828
Signed-off-by: farida azmy <farida.azmy.ext@orange.com>
Change-Id: I9093839265e0d70dd68d7fdded0704942b4d6f71
diff --git a/kubernetes/dcaegen2-services/components/dcae-datalake-des/values.yaml b/kubernetes/dcaegen2-services/components/dcae-datalake-des/values.yaml
index bc5fe3b..9373e82 100644
--- a/kubernetes/dcaegen2-services/components/dcae-datalake-des/values.yaml
+++ b/kubernetes/dcaegen2-services/components/dcae-datalake-des/values.yaml
@@ -146,3 +146,9 @@
       cpu: 2
       memory: 2Gi
   unlimited: {}
+
+#Pods Service Account
+serviceAccount:
+  nameOverride: dcae-datalake-des
+  roles:
+    - read