Diff OpenMPI-3.1.4-GCC-8.3.0.eb with SLURM bindings

gistfile1.txt

```diff 
--- <prefix>/software/EasyBuild/4.2.1/easybuild/easyconfigs/o/OpenMPI/OpenMPI-3.1.4-GCC-8.3.0.eb	2020-04-14 08:01:43.000000000 +0200
+++ <custom_prefix>/easyconfigs/o/OpenMPI/OpenMPI-3.1.4-GCC-8.3.0.eb	2020-04-03 01:39:46.000000000 +0200
@@ -15,12 +15,51 @@
     '46fa94eb417954bdb297291bad4f4d32018af4911bebf3e59af6276eba6a50a9',
 ]

+# needed for --with-verbs
+osdependencies = [(
+    'libibverbs-dev',
+    'libibverbs-devel',
+    'rdma-core-devel'
+)]
+
 dependencies = [
     ('zlib', '1.2.11'),
-    ('hwloc', '1.11.12')
+    ('hwloc', '1.11.12'),
 ]

 # to enable SLURM integration (site-specific)
-# configopts = '--with-slurm --with-pmi=/usr/include/slurm --with-pmi-libdir=/usr'
+# See also CSCS version https://github.com/easybuilders/CSCS/blob/master/easybuild/easyconfigs/o/OpenMPI/OpenMPI-3.1.4-GCC-7.4.0-2.31.1-cuda-9.2.eb
+configopts = (
+    "--enable-static "
+    "--enable-mpi-cxx "
+    "--with-zlib "
+    "--with-hwloc "
+    "--with-pmi "
+    "--with-pmix=external "
+    "--with-libevent=/usr "
+    "--with-verbs "
+    "--with-slurm "
+    "--without-ofi "
+    "--without-ucx "
+    "--without-mxm "
+    "--without-psm2 "
+    "--without-alps "
+    "--without-tm "
+    "--without-loadleveler "
+    "--disable-memchecker "
+    "--enable-dlopen "
+    "--enable-cxx-exceptions "
+    "--without-lsf "
+    "--without-sge "
+    "--without-moab "
+    "--enable-mpirun-prefix-by-default "
+)
+
+sanity_check_paths = {
+    'files': ["bin/%s" % x for x in ["ompi_info", "opal_wrapper", "orterun"]] +
+             ["lib/lib%s.%s" % (x, SHLIB_EXT) for x in ["mpi_mpifh", "mpi", "ompitrace", "open-pal", "open-rte"]] +
+             ["include/%s.h" % x for x in ["mpi-ext", "mpif-config", "mpif", "mpi", "mpi_portable_platform"]],
+    'dirs': [],
+}

 moduleclass = 'mpi'
```