The sparse vector and matrix classes have been un-deprecated.

This is a reversal of a former decision, as we now think we should adopt
a generally accepted behavior which is ... to ignore the problems of
NaNs and infinities in sparse linear algebra entities.

JIRA: MATH-870 (which is therefore NOT fixed)

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/math/trunk@1569825 13f79535-47bb-0310-9956-ffa450edef68