Change default preview config setting (#1580)

Author: trask

agent/agent-tooling/src/main/java/com/microsoft/applicationinsights/agent/internal/sampling/Samplers.java

@@ -11,7 +11,7 @@ public static Sampler getSampler(double samplingPercentage, Configuration config
                 AiSampler.BehaviorIfNoMatchingOverrides.USE_DEFAULT_SAMPLING_PERCENTAGE);
         AiSampler parentSampledSampler = new AiSampler(samplingPercentage, samplingOverrides,
                 AiSampler.BehaviorIfNoMatchingOverrides.RECORD_AND_SAMPLE);
-        // ignoreRemoteParentNotSampled is sometimes needed
+        // ignoreRemoteParentNotSampled is currently needed
         // because .NET SDK always propagates trace flags "00" (not sampled)
         Sampler remoteParentNotSampled = config.preview.ignoreRemoteParentNotSampled ? rootSampler : Sampler.alwaysOff();
         return Sampler.parentBasedBuilder(rootSampler)

agent/agent-tooling/src/main/java/com/microsoft/applicationinsights/agent/internal/wasbootstrap/configuration/Configuration.java

@@ -171,7 +171,9 @@ public static class PreviewConfiguration {
         // not sure if we'll be able to have different metric intervals in future OpenTelemetry metrics world,
         // so safer to only allow single interval for now
         public int metricIntervalSeconds = 60;
-        public boolean ignoreRemoteParentNotSampled;
+        // ignoreRemoteParentNotSampled is currently needed
+        // because .NET SDK always propagates trace flags "00" (not sampled)
+        public boolean ignoreRemoteParentNotSampled = true;
         public LiveMetrics liveMetrics = new LiveMetrics();
     }