feat: make the worst case scenario an hour ago,

since Datadog discards anything that isn't [current](https://docs.datadoghq.com/api/?lang=ruby#post-timeseries-points)

Author: jim80net

lib/slowlog_check.rb

@@ -50,7 +50,7 @@ def minute_precision(time)
   def last_datadog_metric
     series = last_datadog_metrics_submitted_by_me_in_the_last_day[1].fetch("series")
     if series == [] # First invocation
-      return Time.at(0)
+      return minute_precision(Time.now - 3600)
     else
       minute_precision(
         Time.at(

spec/slowlog_check_spec.rb

@@ -133,9 +133,9 @@
     subject { slowlog_check.last_datadog_metric}
 
     context 'first time' do
-      it 'returns epoch time' do
+      it 'returns time an hour ago' do
         allow(ddog).to receive(:get_points) { ["", {"status" => "ok", "series" => [] }] }
-        expect(subject).to eq(Time.at(0))
+        expect(subject).to eq(Time.new(2020,4,20,3,20))
       end
     end