Fix repository fork to create new repository in the right Project

[dtrouillet]

When I want to fork a repository from Project A to Project B, actual bitbucketserver_repository resource try to create in Project A instead of Project B :

resource "bitbucketserver_repository" "backup" {
  project                 = "B"
  name                    = "test
  fork_repository_project = "A"
  fork_repository_slug    = "test"
}

So I replace for the right project variable.