boundary conditions install dir issue

[biljanaorescanin]

With addition of milan nodes scripts were updated to create install directory with new name to separate builds on SLES-12 and SLES-15. This produces our make_bcs.py package to report error can't find install/bin dir.

For example cube grid in make_bcs_cube.py:

if 'install/bin' not in bin_dir:
print(" please run this program in installed bin directory")
return

[biljanaorescanin]

@weiyuan-jiang with merge of this PR (#681) we now have same issue with GEOSldas as we do with GEOSgcm , we can't run make_bcs.py package since it can't find install/bin dir since now it is install-SLES12/bin .

@gmao-rreichle Is the plan to add fix for this on top of this PR(#680)?

[gmao-rreichle]

@gmao-rreichle Is the plan to add fix for this on top of this PR(#680)?

Maybe it's better if we have a separate PR for the Milan/SLES-12/SLES-15 fixes, but it's ok with me if we add it on top of #680. In the latter case, please make sure to update the intro comment of #680

[gmao-rreichle]

addressed with GEOS-ESM/GEOSgcm_GridComp#870