[FIX] correctly handle custom onclick attribute when autopostback = true for checkbox

onclick is in common_attrs not in Attributes, so we can't use BuildScriptAttribute

Signed-off-by: Etienne CHAMPETIER <etienne.champetier@fiducial.net>
[Fix] ReusableHashAlgorithm doesn't set the Key of the ValidationAlgorithm

Without this patch you can't use "WebResource.axd" ressources
in a cluster (each mono instance will get a different link for the same ressource)

Signed-off-by: Etienne CHAMPETIER <etienne.champetier@fiducial.net>
Personnalisation erreurs (Victor)

Signed-off-by: Etienne CHAMPETIER <etienne.champetier@fiducial.net>
Fix spec file

Signed-off-by: Etienne CHAMPETIER <etienne.champetier@fiducial.net>