Wait for initial config to appear before starting test

Author: mcculls

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

@@ -15,6 +15,10 @@ public abstract class BaseApplication {
   public abstract void doLog(String message);
 
   public void run() throws InterruptedException {
+    if (!waitForCondition(() -> null != getLogInjectionEnabled())) {
+      throw new RuntimeException("Logs injection config was never received");
+    }
+
     doLog("BEFORE FIRST SPAN");
 
     firstTracedMethod();