pgsql: Fix pg_indexes view so that it shows the index's tablespace not

Log Message:
-----------
Fix pg_indexes view so that it shows the index's tablespace not the
parent table's tablespace, as per gripe from Michael Kleiser.  Choose
a more plausible column order for this view and pg_tables.  Update
documentation of these views, which was missed in original patch.

Modified Files:
--------------
    pgsql/doc/src/sgml:
        catalogs.sgml (r2.89 -> r2.90)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/catalogs.sgml.diff?r1=2.89&r2=2.90)
    pgsql/src/backend/catalog:
        system_views.sql (r1.9 -> r1.10)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/catalog/system_views.sql.diff?r1=1.9&r2=1.10)
    pgsql/src/include/catalog:
        catversion.h (r1.250 -> r1.251)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/catalog/catversion.h.diff?r1=1.250&r2=1.251)
    pgsql/src/test/regress/expected:
        rules.out (r1.93 -> r1.94)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/expected/rules.out.diff?r1=1.93&r2=1.94)