Tpetra::KokkosRefactor::MV: Added internal comments
Kokkos : Fill a view with a value as:  deep_copy( view , value );
Stokhos:  Use new deep_copy( view, value ) to initialize views.

Speeds up the performance tests a little bit as it avoids a serial loop
over the host mirror.

To make these really fast would require building the graph in parallel.
Tpetra:  Fixed KokkosRefactor::MV so that it compiles again.
MueLu: Added missing std qualifiers

Adding in the namespace to find vector a couple places where the std::vector was
being used weren't specifying the std version and some compilers were getting
confused.