docs: link to the example request map domain class in the request mappings section (#1179)

Author: bkoehm

plugin-core/docs/src/docs/requestMappings/requestmapInstances.adoc

@@ -36,41 +36,10 @@ To use database-backed url security mappings, use the following configuration:
 .Listing {counter:listing}. Configuring database-backed url security rules
 ----
 grails.plugin.springsecurity.securityConfigType = 'Requestmap'
-grails.plugin.springsecurity.requestMap.className = 'com.foo.bar.SecurityMapping'
+grails.plugin.springsecurity.requestMap.className = 'com.mycompany.myapp.SecurityMapping'
 ----
 
-An example request map domain class:
-[source, groovy]
-.Listing {counter:listing}. An example request map domain class
-----
-package com.foo.bar
-
-import org.springframework.http.HttpMethod
-
-import groovy.transform.EqualsAndHashCode
-import groovy.transform.ToString
-
-@EqualsAndHashCode(includes=['configAttribute', 'httpMethod', 'url'])
-@ToString(includes=['configAttribute', 'httpMethod', 'url'], cache = true, includeNames = true, includePackage = false)
-class SecurityMapping implements Serializable {
-
-	private static final long serialVersionUID = 1
-
-	String configAttribute
-	HttpMethod httpMethod
-	String url
-
-	static constraints = {
-		configAttribute(nullable: false, blank: false)
-		httpMethod(nullable: true)
-		url(nullable: false, blank: false, unique: 'httpMethod')
-	}
-
-	static mapping = {
-		cache(true)
-	}
-}
-----
+See <<requestmapClass>> for an example request map domain class.
 
 You create request map entries as you create entries in any Grails domain class: