Fix and clean-up bad EAVT parsing spec.
Merge pull request #188 from ambiata/topic/bad-eavt-test-fix

Fix and clean-up bad EAVT parsing spec.
Fix performance issue with arbitraries
Untangle and cleanup extract mr mapper and its tests Fixes #184, Fixes #108, Fixes #107
fixup! Fix performance issue with arbitraries
fixup! Untangle and cleanup extract mr mapper and its tests Fixes #184, Fixes #108, Fixes #107