build: Remove cmockery2 from repo

While we wait for cmockery2 to be available from Fedora,
we can remove cmockery2 from the repo.

BUG: 1077011

Change-Id: I75d462c607cd376a5d838ea83f4d12eb59757e73
Signed-off-by: Luis Pabon <lpabon@redhat.com>
Reviewed-on: http://review.gluster.org/7281
Reviewed-by: Justin Clift <justin@gluster.org>
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Harshavardhana <harsha@harshavardhana.net>
Reviewed-by: Niels de Vos <ndevos@redhat.com>
Reviewed-by: Anand Avati <avati@redhat.com>