Mods to get xos-core Helm chart working

Change-Id: Ia39b224413f20124fb54dadc419d286e3f28c5d1
diff --git a/xos-core/templates/core-deployment.yaml b/xos-core/templates/core-deployment.yaml
index b9e2c16..b22639e 100644
--- a/xos-core/templates/core-deployment.yaml
+++ b/xos-core/templates/core-deployment.yaml
@@ -42,10 +42,10 @@
           secret:
             secretName: coreapi-cert-secret
             items:
-            - key: core_api_cert.pem
-              path: coreapisecret/core_api_cert.pem
-            - key: core_api_key.pem
-              path: coreapisecret/core_api_key.pem
+            - key: tls.crt
+              path: core_api_cert.pem
+            - key: tls.key
+              path: core_api_key.pem
         - name: xos-core-config
           configMap:
             name: xos-core