Adding possibility to customize the domain name when using Ingress in VOLTHA

Change-Id: Iaad15dfd4e756cba551413c799dd2a14578211a9
diff --git a/voltha/templates/ingress.yaml b/voltha/templates/ingress.yaml
index 69d161c..01158cc 100644
--- a/voltha/templates/ingress.yaml
+++ b/voltha/templates/ingress.yaml
@@ -40,7 +40,7 @@
   rules:
     {{- range .Values.ingress.hosts }}
     {{- if $.Values.ingress.enableVirtualHosts }}
-    - host: '{{ template "virtual-hostname" $ }}'
+    - host: {{ template "virtual-hostname" $ }}
       http:
     {{- else }}
     {{- if .host }}