Add LDAP sample

Add an LDAP sample application.

See gh-7733

spring-boot-samples/spring-boot-sample-data-ldap/src/main/java/sample/data/ldap/Person.java

@@ -0,0 +1,39 @@
+/*
+ * Copyright 2012-2017 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.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package sample.data.ldap;
+
+import javax.naming.Name;
+
+import org.springframework.ldap.odm.annotations.Attribute;
+import org.springframework.ldap.odm.annotations.Entry;
+import org.springframework.ldap.odm.annotations.Id;
+
+@Entry(objectClasses = { "person", "top" })
+public class Person {
+
+	@Id
+	private Name dn;
+
+	@Attribute(name = "telephoneNumber")
+	private String phone;
+
+	@Override
+	public String toString() {
+		return String.format("Customer[dn=%s, phone='%s']", this.dn, this.phone);
+	}
+
+}