Move MPI call out of All2allModelRegion destructor
Move MPI call out of All2allModelRegion destructor

- Fixes #1143

Change-Id: I15f7eb50ed01711163c01a96a9cbfc5434eff903
Signed-off-by: Diana Guttman <98d11df29868673c9a01b97a41154316626a31b0@intel.com>

geopm/geopm,cmcantalupo/geopm,cmcantalupo/geopm,geopm/geopm,cmcantalupo/geopm,cmcantalupo/geopm,geopm/geopm,geopm/geopm,cmcantalupo/geopm,geopm/geopm