Ensure asg-latest-update is renewed with microsecond precision even in mysql (#4269)

Author: geofffranks

app/models/runtime/asg_latest_update.rb

@@ -8,9 +8,9 @@ class AsgTimestamp < Sequel::Model
     def self.renew
       old_update = AsgTimestamp.first
       if old_update
-        old_update.update(last_update: Sequel::CURRENT_TIMESTAMP)
+        old_update.update(last_update: Time.now.utc)
       else
-        AsgTimestamp.create(last_update: Sequel::CURRENT_TIMESTAMP)
+        AsgTimestamp.create(last_update: Time.now.utc)
       end
     end
 

spec/unit/models/runtime/asg_latest_update_spec.rb

@@ -9,6 +9,13 @@ module VCAP::CloudController
         expect(AsgLatestUpdate.last_update).to be > 1.minute.ago
       end
 
+      it 'upates with microsecond precision' do
+        AsgLatestUpdate.renew
+        last_update = AsgLatestUpdate.last_update
+        AsgLatestUpdate.renew
+        expect(AsgLatestUpdate.last_update).to be > last_update
+      end
+
       context 'when there is no previous update' do
         it 'creates an asgLatestUpdate' do
           last_update = AsgLatestUpdate.last_update