openmpi: add latest release 3.0.2 (#8452)

* Add latest release 3.0.2
https://www.open-mpi.org/software/ompi/v3.0/:x



Signed-off-by: Daniel Topa <dantopa@lanl.gov>

* Add in library version in comment

var/spack/repos/builtin/packages/openmpi/package.py

@@ -86,6 +86,7 @@ class Openmpi(AutotoolsPackage):
     version('3.1.0', '0895e268ca27735d7654bf64cee6c256')  # libmpi.so.40.10.0
 
     # Still supported
+    version('3.0.2', '098fa89646f5b4438d9d8534bc960cd6')  # libmpi.so.40.00.2
     version('3.0.1', '565f5060e080b0871a64b295c3d4426a')  # libmpi.so.40.00.1    
     version('3.0.0', '757d51719efec08f9f1a7f32d58b3305')  # libmpi.so.40.00.0
     version('2.1.3', '46079b6f898a412240a0bf523e6cd24b')  # libmpi.so.20.10.2