Dennis Gläser authored Oct 22, 2016 and Timo Koch committed Nov 23, 2016

Up to now the types for the inner and boundary interaction volume seeds
were always identical. For the mpfa-l and other methods, it would be more efficient
if these types could differ, as e.g. the sizes of the containers are known at compile time
for the l method. This commit introduces the capability of the types to differ.

[volvars][cc] Only build boudary volvars on pure dirichlet boundaries. Other they're possibly undefined!

Dennis Gläser authored Jul 19, 2016 and Timo Koch committed Nov 23, 2016

The local objects should not be getting a non const reference
to the corresponding global objects. This way we can get rid of the
list of friend classes in the model needing access to the non const
containers. The local jacobian needs to be friend of the global cache
containers and the model, as it does need to change vol vars during the
calculation of the derivatives. Depending on the global cache being
enabled or not, the corresponding reference to the vol var object
is now obtained in a new specialized method.

(cherry picked from commit 8482b8c9efac0022dd38acbc05424870d4ad27f4)

There are a restriction of the global vector obtained
by a localView call and then bound to an element.