Remove the brkfix library, and use more of goma's functions instead

This removes all the brkfix files that goma already had like rd_exo, wr_exo, etc.

This pull request also requires an update to the standalone brkfix as it removed global_node_dof0 and global_node_kind distributed processing variables from goma, as they were not used in both goma and brkfix, but both older versions try to read/write those netcdf variables.

Passes test suite, and passes parallel problems with new brk and fix syntax

The old way was using a map_names.h to map names like rd_exo to _rd_exo_ for the brk library (from the previous implementation of a brkfix library), now it just uses goma's rd_exo and doesn't use a separate library for brkfix