message: Update spack's mpi
diff: @@ -44,17 +44,13 @@ packages:
  # LLNL toss3 mvapich2
  mvapich2:
  paths:
  - mvapich2@2.2%gcc@4.9.3 arch=linux-rhel7-x86_64: /usr/tce/packages/mvapich2/mvapich2-2.2-gcc-4.9.3
  mvapich2@2.2%gcc@6.1.0 arch=linux-rhel7-x86_64: /usr/tce/packages/mvapich2/mvapich2-2.2-gcc-6.1.0
  mvapich2@2.2%gcc@7.3.0 arch=linux-rhel7-x86_64: /usr/tce/packages/mvapich2/mvapich2-2.2-gcc-7.3.0
  mvapich2@2.2%gcc@8.1.0 arch=linux-rhel7-x86_64: /usr/tce/packages/mvapich2/mvapich2-2.2-gcc-8.1.0
  - mvapich2@2.2%intel@16.0.4 arch=linux-rhel7-x86_64: /usr/tce/packages/mvapich2/mvapich2-2.2-intel-16.0.4
  - mvapich2@2.2%intel@17.0.0 arch=linux-rhel7-x86_64: /usr/tce/packages/mvapich2/mvapich2-2.2-intel-17.0.0
  - mvapich2@2.2%intel@17.0.2 arch=linux-rhel7-x86_64: /usr/tce/packages/mvapich2/mvapich2-2.2-intel-17.0.2
  mvapich2@2.2%intel@18.0.2 arch=linux-rhel7-x86_64: /usr/tce/packages/mvapich2/mvapich2-2.2-intel-18.0.2
  - mvapich2@2.3%clang@3.9.0 arch=linux-rhel7-x86_64: /usr/tce/packages/mvapich2/mvapich2-2.3-clang-3.9.0
  - mvapich2@2.3%clang@3.9.1 arch=linux-rhel7-x86_64: /usr/tce/packages/mvapich2/mvapich2-2.3-clang-3.9.1
  + mvapich2@2.2%intel@19.0.0 arch=linux-rhel7-x86_64: /usr/tce/packages/mvapich2/mvapich2-2.2-intel-19.0.0
  mvapich2@2.3%clang@4.0.0 arch=linux-rhel7-x86_64: /usr/tce/packages/mvapich2/mvapich2-2.3-clang-4.0.0
  + mvapich2@2.3%clang@6.0.0 arch=linux-rhel7-x86_64: /usr/tce/packages/mvapich2/mvapich2-2.3-clang-6.0.0
  buildable: False
  # Spack may grab for mpi & we don't want to use them
  charm:
  