SEC-1996: Fix javadoc to work with jdk 1.5

The javadoc did not work with JDK 1.5 due to a JDK bug fixed in JDK 1.6.

This changed the javadoc that had a tag that started with <a and was not
closed to escape the < >. This resolves the issue with the JDK 1.5 javadoc
bug.

config/src/main/java/org/springframework/security/config/BeanIds.java

@@ -11,7 +11,7 @@ package org.springframework.security.config;
 public abstract class BeanIds {
     private static final String PREFIX = "org.springframework.security.";
 
-    /** The "global" AuthenticationManager instance, registered by the <authentication-manager> element */
+    /** The "global" AuthenticationManager instance, registered by the &lt;authentication-manager&gt; element */
     public static final String AUTHENTICATION_MANAGER = PREFIX + "authenticationManager";
 
     /** External alias for FilterChainProxy bean, for use in web.xml files */