GQL Query Resolvers: Pipeline and Node entities

[rosibaj]

The Graph Manager should talk to the Kubernetes API to get information on:

• Pipelines
• Nodes
• Queue Names

This is a query only, no actions (mutation). This is will be done in a near real-time manner (see wiki: https://wiki.oicr.on.ca/pages/viewpage.action?pageId=154539008)

Expected Outcome

• Pipeline entity exists in the GraphQL that can be queried against
• Nodes entity exists in the GraphQL that can be queried against