Increasing agents neutron report interval and agent down time

Changes:
'agent_down_time' => '30'
'report_interval' => '10'

This changes helps neutron agents send messages over messaging
less frequently and do not overload neutron-server, messaging and DB.

Other confirmations to do this:
1) We have multiple agents in controllers
2) DVR mode where this issue was found has multiple l3 agents in computes
3) Change in upstream available since Juno:
   https://review.openstack.org/#/c/80829/

Change-Id: Ia92e94fe1775ef63b8de8fcd36d220d4f0ab2922
Related-Bug: #1493732

deployment/puppet/openstack/manifests/network.pp

@@ -180,7 +180,7 @@ class openstack::network (
         mac_generation_retries  => 32,
         dhcp_lease_duration     => 600,
         dhcp_agents_per_network => 2,
-        report_interval         => 5,
+        report_interval         => 10,
         rabbit_user             => $amqp_user,
         rabbit_host             => $amqp_host,
         rabbit_hosts            => $amqp_hosts,
@@ -224,7 +224,7 @@ class openstack::network (
           database_connection     => $neutron_db_uri,
           database_max_retries    => -1,
 
-          agent_down_time => 15,
+          agent_down_time => 30,
           allow_automatic_l3agent_failover => true,
 
           api_workers => $service_workers,

tests/noop/spec/hosts/openstack-network/openstack-network-compute_spec.rb

@@ -36,6 +36,12 @@ describe manifest do
         )
       end
 
+      it 'should configure report_interval for neutron' do
+        should contain_class('neutron').with(
+          'report_interval' => '10',
+        )
+      end
+
       it 'should configure auth region for neutron-agents' do
         should contain_class('openstack::network::neutron_agents').with(
          'auth_region' => 'RegionOne',

tests/noop/spec/hosts/openstack-network/openstack-network-controller_spec.rb

@@ -85,6 +85,18 @@ describe manifest do
         )
       end
 
+      it 'should configure agent_down_time for neutron-server' do
+        should contain_class('neutron::server').with(
+          'agent_down_time' => '30',
+        )
+      end
+
+      it 'should configure report_interval for neutron' do
+        should contain_class('neutron').with(
+          'report_interval' => '10',
+        )
+      end
+
       it 'should configure identity uri for neutron' do
         should contain_class('openstack::network').with(
          'identity_uri' => "http://#{service_endpoint}:35357",