Scope
Update spec tests to a consistent commit.

Consider updating the directory structured of the copied spec tests to mirror the specifications repo for easier cross-referencing.

Background
The C driver has specific copies of spec test files. This gives tighter control over when to update a specific test, it comes at the cost of outdated tests copied at varying commits.

Go, Java, PHP use submodules to track the specs repo. And spec tests are now expected to be "immutable". So testing the current state is a supported workflow.