no_negcache set to default

roles/openshift_node/defaults/main.yml

@@ -90,8 +90,9 @@ openshift_node_dnsmasq_install_network_manager_hook: true
 openshift_node_dnsmasq_except_interfaces:
 - lo
 
-# dnsmasq defaults to neg caching enabled with a ttl of 1 second
-openshift_node_dnsmasq_no_negcache: false
+# dnsmasq defaults to neg caching disabled
+openshift_node_dnsmasq_no_negcache: true
+# When openshift_node_dnsmasq_no_negcache is set to false, how many seconds to cache negative lookups.
 openshift_node_dnsmasq_neg_ttl: '1'
 
 r_openshift_node_firewall_enabled: "{{ os_firewall_enabled | default(True) }}"