Add missing Copyright headers in lib (API) code

[ci skip]

Signed-off-by: Alex Coles <alex@alexbcoles.com>
Add/update Copyright headers in specs

[ci skip]

Signed-off-by: Alex Coles <alex@alexbcoles.com>
Add missing Copyright header in migrations

[ci skip]

Signed-off-by: Alex Coles <alex@alexbcoles.com>
Add missing Copyright header in (Rails) config

[ci skip]

Signed-off-by: Alex Coles <alex@alexbcoles.com>
Merge pull request #1653 from opf/fix/copyright-headers

Fix/copyright headers