Don't allow keepalived to switch into 'Failed state'

If network interface link flapped, keepalived may lost VIP and
switch to a Failed state until the service is restarted.

Option 'dont_track_primary' allows keepalived to live in that case.

More explanations: https://bits.enigmabridge.com/articles/2016-11/keepalived-high-available-setup.html

Related QA issues:
  https://mirantis.jira.com/browse/PROD-8063
  https://mirantis.jira.com/browse/PROD-12038

Change-Id: I5a4928469b3f1c844a38b242ed049cf44e91ee51
diff --git a/keepalived/files/keepalived.conf b/keepalived/files/keepalived.conf
index 14b993a..491c0f8 100644
--- a/keepalived/files/keepalived.conf
+++ b/keepalived/files/keepalived.conf
@@ -27,6 +27,7 @@
     {%- else %}
     state MASTER
     {%- endif %}
+    dont_track_primary
     {%- if instance.notify_action is defined %}
     notify /usr/local/bin/keepalived_notify_{{ instance_name }}.sh
     {%- endif %}