Bump version to 1.2.8

Change-Id: Iffd6d0d628ce437780f2f6d6801e5bc94f1e9ef3
Reviewed-on: https://gerrit.causes.com/27699
Reviewed-by: Shane da Silva <shane@causes.com>
Reviewed-by: John Skopis <john.skopis@causes.com>
Tested-by: John Skopis <john.skopis@causes.com>