Java 7 diamonds.

No functional changes
WICKET-5659 Add a setting to MultiFileUploadField to not close the file uploads' streams
WICKET-5660 Throw more specific exception when a component cannot be found by ListenerInterfaceRequestHandler

(cherry picked from commit 9fb48d836a5ad26f991e81222fced6cc290c41e3)
WICKET-5648 CookieUtils - add #loadValues(), make #getCookie() public, properly initialize from the defaults

Remove the newly introduced CookieUtils#loadValues() method.
At http://markmail.org/message/6t5gaeb3c2h24r36 we decided to deprecate all multivalue related methods in 6.x and remove them in 7.x

(cherry picked from commit 89ce5c41be76ea7a7c9c4679e419c15d83aaed07)
WICKET-5648 CookieUtils - add #loadValues(), make #getCookie() public, properly initialize from the defaults

Deprecate all multivalue related methods.
It is not possible to deprecate #save(Strng key, String... values) because most of the time it is used by the applications as #save(key, value)

(cherry picked from commit f7e66e61e3097d32b7767890208436b508747ef1)
WICKET-5648 CookieUtils - add #loadValues(), make #getCookie() public, properly initialize from the defaults

Remove the multivalue related methods