plproxy - plproxy: make plproxy_many robust against random() differences

Log Message:
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make plproxy_many robust against random() differences

Modified Files:
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plproxy/sql:
plproxy_many.sql (r1.1.1.1 -> r1.2)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/plproxy/plproxy/sql/plproxy_many.sql.diff?r1=1.1.1.1&r2=1.2)
plproxy/expected:
plproxy_many.out (r1.2 -> r1.3)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/plproxy/plproxy/expected/plproxy_many.out.diff?r1=1.2&r2=1.3)