Changed the test suite reference value for eta so the test passes after the equation modification.
This change follows the one for r6665 (http://svn.gna.org/viewcvs/relax?rev=6665&view=rev) and had
already been made on the 1.2 line, but was also needed on the 1.3 line. See r6611
(http://svn.gna.org/viewcvs/relax?rev=6611&view=rev) for details.
