Add required salt-formulas to configure cfg node

The patch adds .env file consisting required salt-formulas in order to
render pillars for initial salt states to be run in bootstrap file.

Change-Id: I616f8d7a9abd0e98b4d342187bc6f886369a5ebd
diff --git a/classes/cluster/os-ha-ovs/.env b/classes/cluster/os-ha-ovs/.env
new file mode 100644
index 0000000..fdfff18
--- /dev/null
+++ b/classes/cluster/os-ha-ovs/.env
@@ -0,0 +1 @@
+EXTRA_FORMULAS="ntp sphinx nginx memcached horizon"