Accepting request 562255 from home:eeich:branches:fix-compilers-hpc

- Switch from gcc6 to gcc7 as additional compiler flavor for HPC on SLES.
- Add support for mpich and openmpi3 for HPC.

OBS-URL: https://build.opensuse.org/request/show/562255
OBS-URL: https://build.opensuse.org/package/show/science/hdf5?expand=0&rev=59

_multibuild

@@ -3,6 +3,8 @@
   <package>openmpi</package>
   <package>mvapich2</package>
   <package>gnu-openmpi-hpc</package>
+  <package>gnu-openmpi3-hpc</package>
   <package>gnu-mvapich2-hpc</package>
+  <package>gnu-mpich-hpc</package>
   <package>gnu-hpc</package>
 </multibuild>