Expand debug log

Unfortunately, the logger doesn't provide helpful information in cases when user can't login into XWiki with AD/LDAP account.

One of the cases, when XWiki uses default auth class com.xpn.xwiki.user.impl.xwiki.XWikiAuthServiceImpl and with set DEBUG to org.xwiki.contrib.ldap and re-attempt to login XWiki console will simply include this line

[http://localhost:8080/xwiki/bin/loginsubmit/XWiki/XWikiLogin] WARN nticationFailureLoggerListener - Authentication failure with login [Connect User]