introduce getAppliedConfigSetting helper fn to ConfigCollector

Author: mtoffl01

dd-smoke-tests/log-injection/src/main/java/datadog/smoketest/loginjection/BaseApplication.java

@@ -44,7 +44,8 @@ public void run() throws InterruptedException {
   }
 
   private static Object getLogInjectionEnabled() {
-    ConfigSetting configSetting = ConfigCollector.get().collect().get(LOGS_INJECTION_ENABLED);
+    ConfigSetting configSetting =
+        ConfigCollector.get().getAppliedConfigSetting(LOGS_INJECTION_ENABLED);
     if (configSetting == null) {
       return null;
     }

internal-api/src/main/java/datadog/trace/api/ConfigCollector.java

@@ -51,6 +51,17 @@ public Map<ConfigOrigin, Map<String, ConfigSetting>> collect() {
       return Collections.emptyMap();
     }
   }
-}
 
-// public ConfigSetting getAppliedConfigSetting(String key) {}
+  public ConfigSetting getAppliedConfigSetting(String key) {
+    ConfigSetting best = null;
+    for (Map<String, ConfigSetting> configMap : collected.values()) {
+      ConfigSetting setting = configMap.get(key);
+      if (setting != null) {
+        if (best == null || setting.seqId > best.seqId) {
+          best = setting;
+        }
+      }
+    }
+    return best;
+  }
+}