revert Voltaire for relevant folks
cmr=v1.7.4:reviewer=ompi-rm1.7
Define OSHMEM_HAS_IKRIT removed from configuration file.
Both yoda and ikrit componets are adding in mca_spml_base_open now.
Default component ikrit if found.

Refs: 3763
Implement Jeff`s feedback: Anonymous unions handling
Refs: 3763
reverting r29771, duplicates Brian`s fix