GTNPORTAL-2834 XSS when edit page title
GTNPORTAL-2835 Invalid page title causes unability to edit node
GTNPORTAL-2800: Remove GroupMembershipValidator in OrganizationService
GTNPORTAL-2839: Remove Currency Converter gadget from default package
GTNPORTAL-2813: Membership list in GroupManagement is not ordered alphabetically
GTNPORTAL-2837: Processing of multipart/form-data request failed. Read timeout
GTNPORTAL-2721: Memory leak as too many InputStreamDownloadResource resources are added into DownloadService
GTNPORTAL-2832 Moving the Gadget window in the dashboard doesn't work
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.
GTNPORTAL-2828 CookieTokenService initialization too slow
[maven-release-plugin] prepare release 3.5.3.Final
[maven-release-plugin] prepare for next development iteration
GTNPORTAL-2769 encode nodePath at the beginning of HTTP request. Use portalRequestContext.createURL for render baseURI
GTNPORTAL-2826 GateIn Portal - remote unauthenticated site import
GTNPORTAL-2827 - XML eXternal Entity (XXE) flaw in site import