Update tcar script translation messages (es_ES).
- Previously, translation messages were organized in per-module basis.
This organization makes difficult to run tcar automation scripts in
its pristine state. This update reunifies translation files back
into just one file, the tcar.po files which produces the
LC_MESSAGES/tcar.mo file. This file concentrates translation
messages for all .sh files under Scripts/ directory. The
tcar-*.sh.po files were concatenated into tcar.po to recover the
translation work already done on them. Once the tcar.po file was
updated, all tcar-*.sh.po files were removed.