MATH-1010
Added utility to shuffle an array (based on the method "shuffle" located
in "o.a.c.m.random.RandomDataGenerator"). See also MATH-1019.


git-svn-id: https://svn.apache.org/repos/asf/commons/proper/math/trunk@1512095 13f79535-47bb-0310-9956-ffa450edef68