Network is frequently broken leading to hard to diagnose issues

[Andrew Woodward]

Now in 6.1, It's frequently found to have problems because of vrouter or package fetching. It's now even more important to verify network function after configuring it to ensure that we can meet our needs. If it doesn't work we need to fail in an obvious way that makes it easy to identify and troubleshoot further.

To solve this we should build a task that runs after l23network to verify that we can access every repo listed, this will verify 1) DNS, 2) network, 3) repo's should any fail the deployment should fail in an obvious way.