Repository organization not updated when topics changed in snyk-orgs.yaml

[ebickle]

When there is already a cached list of repositories and the list of topics in snyk-orgs.yaml is changed in a manner that causes a repository to be mapped to a new Snyk organization, no change is made.

• sync.py(107) if self.has_repo(repo.id): returns true
• sync.py(111) if existing_repo.is_older(repo.updated_at): returns false
• The add_repo function then returns without making any change. The old snyk organization is left in place, even though it changed.

The "is_older" if statement should probably contain an additional check to see if the org_name changed as well. Also note that snyk.py(125) may have a bug as well - if the repository changes back to the default that code will be skipped.