Add retry logic for model creation

[drewbanin]

BQ can sometimes return 503 errors. Or, things like "dropped by a concurrent transaction" can occur on Redshift. Should dbt retry these models?

[codingisforlosers]

Other error that pops up ocassionally is:

404 GET https://www.googleapis.com/bigquery/v2/projects/project-id/datasets/dataset/tables?pageToken=table: Not found: Token table

[cmcarthur]

• Bigquery only
• Ignore the 503 case for now
• For the 404 case, when a table is created, it isn't always readable right away. There's some delay before you can query it. So after creating a table, poll until the table becomes available or time out.

[cmcarthur]

this may not be related to dependencies downstream, could perhaps be a bug with create or replace view

[cmcarthur]

fixed in #835, will be out in the next dbt version!

[bbrewington]

@cmcarthur now that this issue is closed, should this TODO be cleaned up? https://github.com/dbt-labs/dbt-bigquery/blob/8ef193a7ebe477f6fbbb01f8996851838f6bd441/dbt/adapters/bigquery/impl.py#L243-L250

(pinging you directly b/c wasn't sure if you would get notified since this is closed)