Fixes #4276: Move r30045 to v1.7.5: release unused components

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r30045 [[BR]]
Try to impose a little bit of consistency on how we parse lists of
modules by enforcing the use of OPAL list accessors.
Fixes #4273: Move r30728 to v1.7 branch (fca: support relocation of fca)

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r30728 [[BR]]
fca: support relocation of fca packages to opal_prefix/../fca 
reviewed by AlexM
cmr=v1.7.5:reviewer=ompi-rm1.7