SEC-941: Embedded ldap-server uses hard-coded ldap url for importing ldif files

http://jira.springframework.org/browse/SEC-941. Changed LdapUtils.parseRootDnFromUrl to use URI.getRawPath() so the returned root value still contains the escaping. I think this should be Ok.

core/src/main/java/org/springframework/security/ldap/LdapUtils.java

@@ -158,7 +158,7 @@ public final class LdapUtils {
 
         if (url.startsWith("ldap:") || url.startsWith("ldaps:")) {
             URI uri = parseLdapUrl(url);
-            urlRootDn = uri.getPath();
+            urlRootDn = uri.getRawPath();
         } else {
             // Assume it's an embedded server
             urlRootDn = url;