In order to debug the MM_gpexpand_2 test failure. TINC prints the full
exception in the TINC log, I think, but I have no access to the log on
the CI machine, and I have not been able to run these tests locally.

This bumps the copyright years to the appropriate years after not
having been updated for some time.  Also reformats existing code
headers to match the upstream style to ensure consistency.

TINC is an internal Pivotal test framework which is used for testing Greenplum.
These regression tests are used regularly to validate internal and external
commits. With this commit, nearly all Greenplum test code will be available for
public usage.