Network Search - Setup Schema - Retrieve Schema from remote nodes

[ciaranschutte]

Description

Network search will need to:

• retrieve remote schemas from Arranger instances
• query configured GQL field for aggregates
• handle retries and early returns on nodes status changing eg. not responding (don't wait for all to return if taking too long)

Output

• [ ] decide on gql calls from a library or http calls with gql strings
• [ ] create fetching handlers
• [ ] create error handlers - including timeouts