Handle not having access to org teams

[elliott-beach]

If hubstats is set to an org for which you are not a member (e.g., sportngin), some features, such as adding webhooks and tracking teams, break. This is fine, but it'd be nice if thehubstats:setup task still succeeded. It breaks when populating teams due to not having access to the ListTeams endpoint.

Stack trace

Finished grabbing info about pull requests, populating teams
rake aborted!
Octokit::Forbidden: GET https://api.github.com/orgs/sportngin/teams?per_page=100: 403 - Must have admin rights to Repository. // See: https://developer.github.com/v3/orgs/teams/#list-teams
/var/lib/gems/2.3.0/gems/octokit-4.7.0/lib/octokit/response/raise_error.rb:16:in `on_complete'
/var/lib/gems/2.3.0/gems/faraday-0.13.1/lib/faraday/response.rb:9:in `block in call'
/var/lib/gems/2.3.0/gems/faraday-0.13.1/lib/faraday/response.rb:61:in `on_complete'
/var/lib/gems/2.3.0/gems/faraday-0.13.1/lib/faraday/response.rb:8:in `call'
/var/lib/gems/2.3.0/gems/octokit-4.7.0/lib/octokit/middleware/follow_redirects.rb:73:in `perform_with_redirection'
/var/lib/gems/2.3.0/gems/octokit-4.7.0/lib/octokit/middleware/follow_redirects.rb:61:in `call'
/var/lib/gems/2.3.0/gems/faraday-0.13.1/lib/faraday/rack_builder.rb:141:in `build_response'
/var/lib/gems/2.3.0/gems/faraday-0.13.1/lib/faraday/connection.rb:387:in `run_request'
/var/lib/gems/2.3.0/gems/faraday-0.13.1/lib/faraday/connection.rb:137:in `get'
/var/lib/gems/2.3.0/gems/sawyer-0.8.1/lib/sawyer/agent.rb:94:in `call'
/var/lib/gems/2.3.0/gems/octokit-4.7.0/lib/octokit/connection.rb:156:in `request'
/var/lib/gems/2.3.0/gems/octokit-4.7.0/lib/octokit/connection.rb:84:in `paginate'
/var/lib/gems/2.3.0/gems/octokit-4.7.0/lib/octokit/client/organizations.rb:287:in `organization_teams'
/home/elliott/me/projects/hubstats2/lib/hubstats/github_api.rb:102:in `update_teams'
/home/elliott/me/projects/hubstats2/lib/tasks/populate_task.rake:113:in `block (3 levels) in <top (required)>'
/home/elliott/me/projects/hubstats2/lib/tasks/populate_task.rake:13:in `block (3 levels) in <top (required)>'
/home/elliott/me/projects/hubstats2/lib/tasks/hubstats_tasks.rake:11:in `block (2 levels) in <top (required)>'
/home/elliott/me/projects/hubstats2/lib/tasks/hubstats_tasks.rake:19:in `block (2 levels) in <top (required)>'
/var/lib/gems/2.3.0/gems/rake-12.2.1/exe/rake:27:in `<top (required)>'

Also, here is my octokit.yml, since it's related to GitHub access-control:

github_auth: # Must include access_token
  access_token:  redacted

github_config: # Must include org_name. The repo_list, team_list, and ignore_users_list are optional.
  org_name: sportngin

webhook_secret: #<40 CHARACTER ACCESS TOKEN >
webhook_endpoint: #<url of webhook endpoint>