[Dev] core schema loading now part of view opening

[Andi Vajda]

In order to fix bug 3387, I moved the core schema loading call into the 
Repository.openView() method which is invoked when a view is 
created and opened - which usually happens automatically - for a repository.

I changed all the code that loaded the core schema pack by removing that call.
If you have scripts that are not checked in that manually load the core schema 
pack, please update them to no longer do so.

Andi..