cpp TP Checkpointing inconsistent after many records

[rhyolight]

The script mentioned below appear out of date. Instead, see https://github.com/numenta/nupic/blob/64400aa71982adb8069ec595ecbd4b9950d23183/tests/integration/nupic/opf/opf_checkpoint_test/opf_checkpoint_test.py#L461-L483

In a test between two models - one checkpointed and the other not - the results begin to vary after many records.

This does not happen for NonTemporal models nor for the python version of the TP.

Tests have been added (currently being skipped) to demonstrate behavior:

• /tests/regression/checkpointCompatibility/TestCheckpointValidity.py

Feeds 300 records through two raw clamodel objects, checkpointing one after 100 records. This test is more for debugging to give the ability to view internal properties of the models.

• /qa/opf/opfLocalCheckpointTest/TestOpfLocalCheckpoints.py

Tests PositiveTests.test_TemporalMultiStep and test_TemporalAnomaly, these generate experiments and run two models, one checkpointed one not and verify results. This is a more comprehensive test but does not give good insight into the models.