Development  Project Seed Data Fix

After this commit https://dev.gitlab.org/gitlab/gitlabhq/commit/1d2bdb4d5880bb1ad39b62c81ff2971aa0cb3798 Contexts were replaced with Services. One context remained in the seed data which means development seeding will fail.

@dzaporozhets Do we want to backport this to 6.5 too?

/cc @jacobvosmaer @sytse