MueLu: simplified and cleaned up the tutorial driver
MueLu: changed tutorial xmls to easy
TrilinosCouplings:  Add fake UQ problem for the ensemble driver.

Added --uq-fake command line option to setup a fake UQ problem of the
given size (in terms of number of quadrature points).  All of the
samples are the same and are equal to 0.  This makes it easier to
extract architectural differences between the scalar and ensemble
sampling approaches, independent of changes in the number of CG
iterations for a real UQ problem.
Tpetra: Fixed public documentation of this file.

I don't want to be listed as the author of this file, as long as it
has code that names variables "var27".  Seriously, "var27"???

Build/Test Cases Summary
Enabled Packages: Tpetra
Enabled all Forward Packages
0) MPI_DEBUG => passed: passed=533,notpassed=0 (15.44 min)
1) SERIAL_RELEASE => passed: passed=460,notpassed=0 (2.22 min)
MueLu: Fixed grammar and formatting of tutorial driver comments.

This commit only affects comments, not source code.
MueLu: Fixed typo in Python hands-on demo script comment

Build/Test Cases Summary
Enabled Packages: MueLu
Enabled all Forward Packages
0) MPI_DEBUG => passed: passed=533,notpassed=0 (15.44 min)
1) SERIAL_RELEASE => passed: passed=460,notpassed=0 (2.22 min)
Other local commits for this build/test group: cdf9c69
For zeroing out boundary condition rows: instead of setting entries to zero,
setting entries to very small numbers. If values are set to zero, this causes
a seg fault within the matrix-matrix multiply. This is an issue that needs to
be addressed.
Stokhos:  Update MP::Vector assembly performance test.

Added OpenMP, updated assembly code from latest TrilinosCouplings/FENL,
and added logic for setting device-ID in multi-gpu scenarios.
Kokkos:  Fixing bad push to Kokkos_CrsMatrix.hpp.

In my previous commit, I accidentally pushed changes to
Kokkos_CrsMatrix.hpp that back it up to a previous commit before
vectorization was added.  This commit takes it back to where it was.
Stokhos:  Fix printing of header in MP::Vector mat-vec perf test.
KokkosContainers: add comments to Kokkos_Bitset.hpp
MueLu: fixing some headers
ifdef'd out code to do block Jacobi instead of block GS. It might
be useful to really put block Jacobi instead of block GS, but I'll
hold off for now. This ifdef'd code will be used in experiments to
see if block Jacobi is worthwhile.