Reduce test expected minimum number of evaluations

This test was failing as the optimizer converged sooner than expected.
This is not important if the correct result is obtained.

Author: aherbert

commons-math-legacy/src/test/java/org/apache/commons/math4/legacy/optim/nonlinear/scalar/MultiStartMultivariateOptimizerTest.java

@@ -73,7 +73,7 @@ public void testCircleFitting() {
         }
 
         final int numEval = optimizer.getEvaluations();
-        Assert.assertTrue("exp: n > 700, act: " + numEval, numEval > 700);
+        Assert.assertTrue("exp: n > 500, act: " + numEval, numEval > 500);
         Assert.assertTrue("exp: n < 950, act: " + numEval, numEval < 950);
 
         Assert.assertEquals(3.1267527, optimum.getValue(), 1e-8);