CAS-1474: Deprecated unneeded "requireSecure" settings 

The `requireSecure` property is no longer needed, as the security enforcement of callback urls should be handled by the proxy settings of a given app. 
It makes sense. Its reminds me that the upgrade between 4.0 and 4.1 will break services definitions!

In fact, in 4.1, the proxy policy should be ```RegexMatchingRegisteredServiceProxyPolicy("https://.*")``` to have a service "allowed to proxy" and with "requireSecure" like in 4.0, right?