Most of the 3D errors were due to ... wrong tests.

The dimension was set to 2 instead of 3.

There is still one problem, so investigation continues.

JIRA: MATH-1096

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/math/trunk@1562959 13f79535-47bb-0310-9956-ffa450edef68