Handling broken master pipelines

We run nightly pipelines for building both CE and EE package in our Release mirror: https://dev.gitlab.org/gitlab/omnibus-gitlab. This mirror is configured to send pipeline failure notifications to #g_distribution channel on Slack. A broken master pipeline gets priority over other scheduled work as per our development guidelines.

Jobs are stuck due to no runners being active

This is a transient error due to connection issues between runner manager machine and dev.gitlab.org.

1. Sign in to runner manager machine.

2. Run the following command to force a connection between runner and GitLab

   sudo gitlab-runner verify