[NR-497594] Fix throughput & error rate golden metric definition (#2528)

* Fix throughput & error rate golden metric definition (metric `http.server.requests`)

* Case-sensitive fix

Author: tparanhos

entity-types/ext-service/golden_metrics.yml

@@ -10,10 +10,10 @@ throughput:
       select: rate(count(apm.service.transaction.duration), 1 minute)
       from: Metric
     kamon-agent:
-      select: rate(sum(http.server.requests), 1 minute) as 'count'
+      select: rate(count(http.server.requests), 1 minute) as 'count'
       from: Metric
     micrometer:
-      select: rate(sum(http.server.requests), 1 minute) as 'count'
+      select: rate(count(http.server.requests), 1 minute) as 'count'
       from: Metric
     pixie:
       select: rate(count(http.server.duration), 1 minute)
@@ -34,10 +34,10 @@ errorRate:
       select: sum(apm.service.error.count) * 100 / count(apm.service.transaction.duration)
       from: Metric
     kamon-agent:
-      select: (filter(sum(http.server.requests), where http.status_code = '5xx') * 100) / sum(http.server.requests)
+      select: (filter(count(http.server.requests), where http.status_code = '5xx') * 100) / count(http.server.requests)
       from: Metric
     micrometer:
-      select: (filter(sum(http.server.requests), where exception IS NOT NULL and exception != 'None') * 100) / sum(http.server.requests)
+      select: (filter(count(http.server.requests), where exception IS NOT NULL and exception != 'none') * 100) / count(http.server.requests)
       from: Metric
     pixie:
       select: (filter(count(http.server.duration), where numeric(http.status_code) >= 400 AND numeric(http.status_code) != 404) * 100) / count(http.server.duration)