Log Message:
-----------
fix metadata queries to match the RTM release
Modified Files:
--------------
Npgsql2/src/Npgsql:
NpgsqlSchema.ssdl (r1.5 -> r1.6)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/npgsql/Npgsql2/src/Npgsql/NpgsqlSchema.ssdl.diff?r1=1.5&r2=1.6)