Cleanup and LMID updates

[vkaushal288-alivecor]

Two main changes:

1. Updated the error messages with LMIDs. I found that having the same error message for checksum verification failure for all block types was causing a small problem with debugging the failures.
2. Removed a test package which we were depending upon. We had just 3 assertions in total. Importing a full third party library for just that looked like an overdo for the task.