Per RFC, continue pecking away at the build system renaming
   OMPI_CONFIG_SUBDIR  -> OPAL_CONFIG_SUBDIR
   OMPI_CONFIG_SUBDIR_ARGS  ->  OPAL_CONFIG_SUBDIR_ARGS
Per RFC, continue the build system renaming
   OMPI_C_GET_ALIGNMENT  -> OPAL_C_GET_ALIGNMENT
   ompi_cv_c_align_  ->  opal_cv_c_align_
Fix comment and add copyright
Complete the cleanup of this file