Fixed Levenberg-Marquardt optimizer that did not use the vectorial convergence checker. Now this optimizer can use either the general vectorial convergence checker or its own specialized convergence settings. Minor changes had to be introduced in the test data, they have been validated JIRA: MATH-362
commons/proper/math/trunk/src/main/java/org/apache/commons/math/optimization/general/LevenbergMarquardtOptimizer.java