FAB-16437 Remove common/mocks from v12 validator

- stop using common/mocks in
core/handlers/validation/builtin/v12
- stop using mock cc as it adds more complexity than
needed when you can simply "create" lscc records

Change-Id: I22430f467b9cb95661688daa5fde42a55b870a43
Signed-off-by: Gari Singh <gari.r.singh@gmail.com>

Author: mastersingh24