CachingSecurityManager

[Alan D. Cabrera]

This class attempts to use EhCacheManager as the default cache  
manager, if Ehcache is in the classpath.  If it's not, then there is  
no cache manager.  This breaks SimpleAccountRealm and anything that  
inherits from it, i.e. PropertiesRealm, the default realm.  So, if  
Ehcache is not in the classpath, the default behavior of JSecurity is  
broken.

IMO, we should either make a hard dependency on Ehcache or make  
HashtableCacheManager the default cache manager.


Regards,
Alan