GTNPORTAL-2795: User sites don't show up in MOP management extension
GTNPORTAL-2804 Invalid property 'PortalPermissionSelector' or
'PagePermissionSelector' instead of 'Access Permission Setting'
GTNPORTAL-2473 Encrypt password in CookieTokenService and store salted
hashes instead of plain tokens

New JCR mixin node type is used to stay as backwards compatible as
possible.