Merge branch 'paulmullowney/txpetscgpu-package-removal2'

PCBDDC: remove Enum on coarse communications since they are now the same

Partial cleanup of SetUpCoarseSolver. MULTILEVEL_BDDC will be wrapped into functions

PCBDDC: PARALLEL_BDDC case now handled trough MatConvert_IS_AIJ

MatConvert_IS_AIJ only supports MAT_INITIAL_MATRIX and MPIAIJ.
No reasons to make it public.

PCBDDC: Global numbering of coarse dofs moved to a separate routine

rm psubcomm from MatGetRedundantMatrix() because Jed does not like it :-(

rm psubcomm from MatGetRedundantMatrix_MPIAIJ_interlaced(), from all app codes

PCBDDC: move mpi calls outside block for primal dofs numbering

PCBDDC: Hide deluxe functions.

Linking stage was broken on Tiger. Now fixed.

PCBDDC: remove integer arrays for primal indices from bddc private struct

Merge branch 'stefano_zampini/pcbddc-mirrorsfix' into stefano_zampini/pcbddc-improvecoarsesolver

PCBDDC: coarse_mat is no longer a member of bddc private struct.

PCBDDC: remove REPLICATED_BDDC and SEQUENTIAL_BDDC branches.

GATHERS_BDDC are no longer needed, thus removed.

PCBDDC: Set defaults for BDDC customization

set defaut psubcomm->type=PETSC_SUBCOMM_CONTIGUOUS

replace MatGetRedundantMatrix_MPIAIJ_xxx() by MatGetRedundantMatrix() in PCSetUp_Redundant(); passed tests of sp/ksp/examples/tutorials/ex5.c and mat/examples/tests/ex9.c

add 'psubcomm' as an input for MatGetRedundantMatrix(): user can provide his own subcomm, or psubsomm, or nsubcomm

add PetscSubcommSetFromOptions(); PCRedundant can swith to PETSC_SUBCOMM_CONTIGUOUS at runtime

implement MatGetRedundantMatrix for psubcomm_type CONTIGUOUS; rename MatGetRedundantMatrix_MPIAIJ_interlaced to MatGetRedundantMatrix_MPIAIJ_psubcomm

add small comment

bugfix

cleanup PCSetUp_Redundant(); add tests for PCRedundant

cleanup PCSetUp_Redundant()

optimize PCApply_Redundant() in the case !useparallelmat

rm mlocal_red from MatGetRedundantMatrix()
set defaults in PetscSubcommCreate()

PCBDDC: Less tricky customization from options