(POOLER-178) Target Stats for api & manager

Ensure that the correct stats are registered for the Manager and the api
respectively. E.g. all checkout counters are for the api only, whereas
clone times belong to the manager.

Also new ondemand functionality stats weren't registered, so add these
along with missing delete stats.

spec/unit/promstats_spec.rb

@@ -55,7 +55,7 @@ describe 'prometheus' do
   context 'setup_prometheus_metrics' do
     before(:all) do
       Prometheus::Client.config.data_store = Prometheus::Client::DataStores::Synchronized.new
-      subject.setup_prometheus_metrics
+      subject.setup_prometheus_metrics(%i[api manager])
     end
     let(:MCOUNTER) { 1 }
 
@@ -63,7 +63,7 @@ describe 'prometheus' do
       it 'calls add_prometheus_metric for each item in list' do
         Prometheus::Client.config.data_store = Prometheus::Client::DataStores::Synchronized.new
         expect(subject).to receive(:add_prometheus_metric).at_least(subject.vmpooler_metrics_table.size).times
-        subject.setup_prometheus_metrics
+        subject.setup_prometheus_metrics(%i[api manager])
       end
     end
 
@@ -102,6 +102,48 @@ describe 'prometheus' do
           po.get(labels: metric[:labels])
         }.by(1)
       end
+      it 'Increments delete.failed' do
+        bad_template = 'test-template'
+        expect { subject.increment('delete.failed') }.to change {
+          metric, po = subject.get('delete.failed')
+          po.get(labels: metric[:labels])
+        }.by(1)
+      end
+      it 'Increments delete.success' do
+        bad_template = 'test-template'
+        expect { subject.increment('delete.success') }.to change {
+          metric, po = subject.get('delete.success')
+          po.get(labels: metric[:labels])
+        }.by(1)
+      end
+      it 'Increments ondemandrequest_generate.duplicaterequests' do
+        bad_template = 'test-template'
+        expect { subject.increment('ondemandrequest_generate.duplicaterequests') }.to change {
+          metric, po = subject.get('ondemandrequest_generate.duplicaterequests')
+          po.get(labels: metric[:labels])
+        }.by(1)
+      end
+      it 'Increments ondemandrequest_generate.success' do
+        bad_template = 'test-template'
+        expect { subject.increment('ondemandrequest_generate.success') }.to change {
+          metric, po = subject.get('ondemandrequest_generate.success')
+          po.get(labels: metric[:labels])
+        }.by(1)
+      end
+      it 'Increments ondemandrequest_fail.toomanyrequests.#{bad_template}' do
+        bad_template = 'test-template'
+        expect { subject.increment("ondemandrequest_fail.toomanyrequests.#{bad_template}") }.to change {
+          metric, po = subject.get("ondemandrequest_fail.toomanyrequests.#{bad_template}")
+          po.get(labels: metric[:labels])
+        }.by(1)
+      end
+      it 'Increments ondemandrequest_fail.invalid.#{bad_template}' do
+        bad_template = 'test-template'
+        expect { subject.increment("ondemandrequest_fail.invalid.#{bad_template}") }.to change {
+          metric, po = subject.get("ondemandrequest_fail.invalid.#{bad_template}")
+          po.get(labels: metric[:labels])
+        }.by(1)
+      end
       it 'Increments config.invalid.#{bad_template}' do
         bad_template = 'test-template'
         expect { subject.increment("config.invalid.#{bad_template}") }.to change {