Consider rehousing roppbufrcodes.nl

[Ian Culverwell]

ROPP-10 beta reviewers Christian Marquardt and Leonid Butenko say:

The file robbbufrcodes.nl is installed into the directory at which  one of the
environment variables BUFR_TABLES (for the ECMWF BUFR  library) or BUFR_LIBRARY
for the MetOffice BUFR library. These environment variables are also used by the
respective library to point data files and bufr tables relevant for these
libraries. The namelist file, however, is not relevant for these libraries; it
is only used by a small number of ROPP tools. Therefore, they shouldn't be
installed into the directory trees of these libraries. A much better option
would be to put them into a path like <prefix>/share/ropp which would also be
more in line with the usual directory layout for automake/autoconf pojects as
well as Unix software in general.

Consider for ROPP-11.0.

[Ian Culverwell]

This is a duplicate of #668. Closing.