Fixes #3925: Javadoc updates

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r29710 [[BR]]
Update Javadoc

r29713 [[BR]]
Update Javadoc
Fixes #3924: Move r29711 to v1.7 branch (We now require AM 1.12.2)

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r29711 [[BR]]
We now require AM 1.12.2

cmr=v1.7.4:reviewer=jsquyres
Fixes #3923: Move r29709 to v1.7 branch (Update HACKING file to point)

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r29709 [[BR]]
Update HACKING file to point version info to the OMPI web site so we avoid future confusion of minimum required levels

cmr=v1.7.4:reviewer=jsquyres