Shave a few seconds off the test suite by having the default test fixture create a single default type info provider and clone it when a new one is needed, instead of constructing a default provider from scratch every time.
Make the EvaluatorPool smaller.
Test file cleanup
Tweak memory usage characteristics of TypeInfoProvider slightly
Fix a memory leak in the automated tests that was causing a complete test run's memory usage to grow up to nearly 1.5GB.