[Minor] fixed broken tests due to wrong checking for observer updates

src/main/java/li/strolch/agent/impl/DefaultObserverHandler.java

@@ -17,6 +17,7 @@ package li.strolch.agent.impl;
 
 import java.text.MessageFormat;
 import java.util.ArrayList;
+import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 
@@ -36,6 +37,10 @@ public class DefaultObserverHandler implements ObserverHandler {
 
 	private Map<String, List<Observer>> observerMap;
 
+	public DefaultObserverHandler() {
+		this.observerMap = new HashMap<>();
+	}
+
 	@Override
 	public void add(String key, List<StrolchRootElement> elements) {
 		List<Observer> observerList = this.observerMap.get(key);

src/main/java/li/strolch/agent/impl/InternalStrolchRealm.java

@@ -101,25 +101,16 @@ public abstract class InternalStrolchRealm implements StrolchRealm {
 		this.lockHandler = new DefaultLockHandler(this.realm, timeUnit, time);
 	}
 
-	/**
-	 * @return the auditTrailEnabled
-	 */
 	@Override
 	public boolean isAuditTrailEnabled() {
 		return this.auditTrailEnabled;
 	}
 
-	/**
-	 * @return the auditTrailEnabledForRead
-	 */
 	@Override
 	public boolean isAuditTrailEnabledForRead() {
 		return this.auditTrailEnabledForRead;
 	}
 
-	/**
-	 * @return
-	 */
 	@Override
 	public boolean isUpdateObservers() {
 		return this.updateObservers;
@@ -127,6 +118,8 @@ public abstract class InternalStrolchRealm implements StrolchRealm {
 
 	@Override
 	public ObserverHandler getObserverHandler() {
+		if (!this.updateObservers)
+			throw new IllegalArgumentException("ObserverUpdates are not enabled!"); //$NON-NLS-1$
 		return this.observerHandler;
 	}