[Blueprint servercloud-p-arm-openmpi] Update OpenMPI to the 1.5 version with ARM support

[Dave Walker]

Blueprint changed by Dave Walker:

Whiteboard changed:
-  Nothing to discuss, we just either update the existing one or add
- another package version into the archive. -robbie.w
+  Nothing to discuss, we just either update the existing one or add another package version into the archive. -robbie.w
+ Added a bug task to track activity. -- Daviey

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Update OpenMPI to the 1.5 version with ARM support
https://blueprints.launchpad.net/ubuntu/+spec/servercloud-p-arm-openmpi