Wrong resource and operation descriptions for Elytron filesystem-realm in CLI and XSD

There are some wrong or insufficient resource and operation description for Elytron filesystem-realm in CLI:

• attribute levels for filesystem-realm - description says "The number of levels of directory hashing to apply.", but created directory structure does not use any hashing. Example how it works: when levels is set to 3 then for user admin following directory structure and file a/d/m/admin.xml is used. Description of levels should be fixed. This should be also fixed in XSD.
• description of digest password encryption/hash mechanisms in set-password operation for identity of filesystem-realm says "A password using a salted digest." which is wrong. It seems it is copy-pasted from salted-simple-digest.