Install logrotate formula during SaltMaster bootstrap

Logrotate is basic system functionality we should manage on each host.
Since we are going to add it to linux.single metadata, it should be
preinstalled on cfg node to render pillar successfully.

Change-Id: I72aecb3a9ce4010e5cb43fa323c8b7e54c5f9243
Related-Prod: PROD-19346
diff --git a/classes/cluster/os-ha-ovs-pike/.env b/classes/cluster/os-ha-ovs-pike/.env
index ff12bb9..be4225d 100644
--- a/classes/cluster/os-ha-ovs-pike/.env
+++ b/classes/cluster/os-ha-ovs-pike/.env
@@ -1 +1 @@
-EXTRA_FORMULAS="ntp sphinx nginx memcached horizon neutron runtest artifactory"
+EXTRA_FORMULAS="ntp sphinx nginx memcached horizon neutron runtest artifactory logrotate"