Unittests missing for critical code in math/*Matrix*

[breznak]

There's a lot of tests in https://github.com/numenta/nupic.core/tree/master/src/test/unit/math
that are actually fake and the code is commented out! As this should be critical code, we need the tests back and running.

Here is a list of math test files containing entirely commented out code:

---

• Review commented-out unit tests for DenseTensorUnitTest
• Review commented-out unit tests for DomainUnitTest
• Review commented-out unit tests for IndexUnitTest
• Review commented-out unit tests for MathsTest
• Review commented-out unit tests for SparseMatrix01UnitTest
• Review commented-out unit tests for SparseMatrixUnitTest
• Review commented-out unit tests for SparseTensorUnitTest

[SaganBolliger]

Here is a list of math test files containing entirely commented out code:
DenseTensorUnitTest
DomainUnitTest
IndexUnitTest
MathsTest
SparseMatrix01UnitTest
SparseMatrixUnitTest
SparseTensorUnitTest

[rhyolight]

Please review this issue

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[breznak]

confirmed, tests are still commented out