Propagate target exception

Closes gh-660

Author: jzheaux

core/src/main/java/org/springframework/ldap/core/support/AbstractTlsDirContextAuthenticationStrategy.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2005-2013 the original author or authors.
+ * Copyright 2005-2024 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -18,6 +18,7 @@
 
 import java.io.IOException;
 import java.lang.reflect.InvocationHandler;
+import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
 import java.lang.reflect.Proxy;
 import java.util.Hashtable;
@@ -203,7 +204,12 @@ else if (method.getName().equals(GET_TARGET_CONTEXT_METHOD_NAME)) {
 				return this.target;
 			}
 			else {
-				return method.invoke(this.target, args);
+				try {
+					return method.invoke(this.target, args);
+				}
+				catch (InvocationTargetException ex) {
+					throw ex.getTargetException();
+				}
 			}
 		}