adding bbsim helm chart test

Change-Id: I165b03b114a0f6974645fd19586124d998d5dcb3
diff --git a/bbsim/values.yaml b/bbsim/values.yaml
index 7cd295b..26c50c2 100644
--- a/bbsim/values.yaml
+++ b/bbsim/values.yaml
@@ -45,6 +45,10 @@
     repository: 'voltha/voltha-bbsim'
     tag: '{{ .Chart.AppVersion }}'
     pullPolicy: 'Always'
+  xos_api_tester:
+    repository: 'xosproject/xos-api-tester'
+    tag: 'master'
+    pullPolicy: 'Always'
 
 global:
   registry: ''
@@ -63,4 +67,4 @@
 
 tolerations: []
 
-affinity: {}
+affinity: {}
\ No newline at end of file