Add c++14, etc support

[ndellingwood]

Cross-reference #349

Kokkos support added via PR's kokkos/kokkos#1913 kokkos/kokkos#1915 (see issue kokkos/kokkos#1914)

[ndellingwood]

1. Update generate_makefile.bash and test_all_sandia to allow for cxxstandard optional argument

2. Fix/workaround issues reported in Internal compiler error in KokkosBatched::Experimental::TeamGemm #349 related to TeamGemm

[ndellingwood]

I'll update the scripts shortly, juggling a couple things at the moment.

[ndellingwood]

PR #352 addresses the first item, updating the scripts.

[ndellingwood]

Added @crtrott since he will look into the TeamGEMM issue.

[ndellingwood]

PR #357 merged with fixes by @crtrott for TeamGEMM from #349.
Nightly testing added with builds:
gcc/7.2.0 OpenMP
xl/16.1.1 Serial

[ndellingwood]

@crtrott @srajama1
KokkosKernels now compiles and tests pass with c++14 support:

White, Kepler nodes

bash-4.2$ ../../scripts/test_all_sandia cuda/9.2.88 --with-sclars=double --with-ordinals=int --with-offsets=int --build-list=Cuda_Serial --cxxstandard="c++14"
Running on machine: white
Going to test compilers:  cuda/9.2.88
Testing compiler cuda/9.2.88
  Starting job cuda-9.2.88-Cuda_Serial-release
  PASSED cuda-9.2.88-Cuda_Serial-release
#######################################################
PASSED TESTS
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cuda-9.2.88-Cuda_Serial-release build_time=572 run_time=616
#######################################################
FAILED TESTS
#######################################################