Update fences in agreement with Kokkos deprecations

[ndellingwood]

See kokkos/kokkos#2140
The fence as a static member function of execution spaces was
deprecated, made non-static.

[ndellingwood]

Spot-check running on kokkos-dev-2. This is required for the 2.9 release.

[ndellingwood]

Host spot-check results:

Running on machine: sems
Going to test compilers:  gcc/5.3.0 gcc/7.2.0 intel/17.0.1 clang/3.9.0 cuda/9.2
Testing compiler gcc/5.3.0
Testing compiler gcc/7.2.0
Testing compiler intel/17.0.1
  Starting job gcc-7.2.0-Serial-release
  Starting job gcc-5.3.0-OpenMP-release
  PASSED gcc-5.3.0-OpenMP-release
Testing compiler clang/3.9.0
  Starting job intel-17.0.1-OpenMP-release
  PASSED gcc-7.2.0-Serial-release
Testing compiler cuda/9.2
  Starting job clang-3.9.0-Pthread_Serial-release
  PASSED intel-17.0.1-OpenMP-release
  PASSED clang-3.9.0-Pthread_Serial-release

Cuda failed because I forgot to set the correct arch, will update this comment after rerunning the Cuda builds.

[ndellingwood]

A power outage is preventing me from copy/pasting the cuda results. Merging this PR, will paste results once I have access again.

[ndellingwood]

Cuda spot-check results from kokkos-dev-2:

Running on machine: sems
Going to test compilers:  cuda/9.2
Testing compiler cuda/9.2
  Starting job cuda-9.2-Cuda_OpenMP-release
  PASSED cuda-9.2-Cuda_OpenMP-release
  Starting job cuda-9.2-Cuda_Pthread-release
  PASSED cuda-9.2-Cuda_Pthread-release
  Starting job cuda-9.2-Cuda_Serial-release
  PASSED cuda-9.2-Cuda_Serial-release
#######################################################
PASSED TESTS
#######################################################
cuda-9.2-Cuda_OpenMP-release build_time=436 run_time=283
cuda-9.2-Cuda_Pthread-release build_time=409 run_time=362
cuda-9.2-Cuda_Serial-release build_time=415 run_time=371
#######################################################
FAILED TESTS
#######################################################