added-yang-linter-and-resolved-all-error-produced-by it

Change-Id: Iba95a07bb1ed6230b9a900448bf294355a58285c
diff --git a/config-models/aether-2.1.x/Chart.yaml b/config-models/aether-2.1.x/Chart.yaml
index fb7fc19..93cfa93 100644
--- a/config-models/aether-2.1.x/Chart.yaml
+++ b/config-models/aether-2.1.x/Chart.yaml
@@ -4,7 +4,7 @@
 
 apiVersion: v2
 name: config-model-aether-2
-version: 2.1.4
+version: 2.1.5
 kubeVersion: ">=1.18.0"
 appVersion: 2.1.0
 description: Aether config model