Minor refactor extract method InstrumentationHelper

This will hopefully improve readability since this method is getting a
little long now.

lib/gitlab/instrumentation_helper.rb

@@ -20,43 +20,60 @@ module Gitlab
     DURATION_PRECISION = 6 # microseconds
 
     def add_instrumentation_data(payload)
+      instrument_gitaly(payload)
+      instrument_rugged(payload)
+      instrument_redis(payload)
+      instrument_redis_bytes(payload)
+      instrument_elasticsearch(payload)
+    end
+
+    def instrument_gitaly(payload)
       gitaly_calls = Gitlab::GitalyClient.get_request_count
 
-      if gitaly_calls > 0
+      return if gitaly_calls == 0
+
       payload[:gitaly_calls] = gitaly_calls
       payload[:gitaly_duration_s] = Gitlab::GitalyClient.query_time
     end
 
+    def instrument_rugged(payload)
       rugged_calls = Gitlab::RuggedInstrumentation.query_count
 
-      if rugged_calls > 0
+      return if rugged_calls == 0
+
       payload[:rugged_calls] = rugged_calls
       payload[:rugged_duration_s] = Gitlab::RuggedInstrumentation.query_time
     end
 
+    def instrument_redis(payload)
       redis_calls = Gitlab::Instrumentation::Redis.get_request_count
 
-      if redis_calls > 0
+      return if redis_calls == 0
+
       payload[:redis_calls] = redis_calls
       payload[:redis_duration_s] = Gitlab::Instrumentation::Redis.query_time
     end
 
+    def instrument_redis_bytes(payload)
       redis_read_bytes = Gitlab::Instrumentation::Redis.read_bytes
       redis_write_bytes = Gitlab::Instrumentation::Redis.write_bytes
-      if redis_read_bytes > 0 || redis_write_bytes > 0
+
+      return if redis_read_bytes == 0 && redis_write_bytes == 0
+
       payload[:redis_read_bytes] = redis_read_bytes
       payload[:redis_write_bytes] = redis_write_bytes
     end
 
+    def instrument_elasticsearch(payload)
       # Elasticsearch integration is only available in EE but instrumentation
       # only depends on the Gem which is also available in FOSS.
       elasticsearch_calls = Gitlab::Instrumentation::ElasticsearchTransport.get_request_count
 
-      if elasticsearch_calls > 0
+      return if elasticsearch_calls == 0
+
       payload[:elasticsearch_calls] = elasticsearch_calls
       payload[:elasticsearch_duration_s] = Gitlab::Instrumentation::ElasticsearchTransport.query_time
     end
-    end
 
     # Returns the queuing duration for a Sidekiq job in seconds, as a float, if the
     # `enqueued_at` field or `created_at` field is available.