Change order of type parameters in Hash<V,K> type to Hash<K,V>
The order of type parameters in Hash<V,K> does not reflect the order of types in current programming languages; it should be changed to Hash<K,V> to align better.
No impact expected, since readers of the specifications already map the current form to the reverse order used in Java and other programming languages.
See Foundation Types spec, Structure Types section: http://www.openehr.org/releases/BASE/latest/docs/foundation_types/foundation_types.html#_structure_types
Hash type is changed to "Hash<K,V>" (was Hash<V, K>).