Use ConfigProperties method 'getDuration' when looking for the snapshot profiling sampling interval.

Author: tduncan

profiler/src/main/java/com/splunk/opentelemetry/profiler/Configuration.java

@@ -224,10 +224,8 @@ public static int getSnapshotProfilerStackDepth(ConfigProperties properties) {
   }
 
   public static Duration getSnapshotProfilerSamplingInterval(ConfigProperties properties) {
-    int millis = properties.getInt(CONFIG_KEY_SNAPSHOT_PROFILER_SAMPLING_INTERVAL, 0);
-    if (millis > 0) {
-      return Duration.ofMillis(millis);
-    }
-    return DEFAULT_SNAPSHOT_PROFILER_SAMPLING_INTERVAL;
+    return properties.getDuration(
+        CONFIG_KEY_SNAPSHOT_PROFILER_SAMPLING_INTERVAL,
+        DEFAULT_SNAPSHOT_PROFILER_SAMPLING_INTERVAL);
   }
 }