ListQuotas: Refactor apply method's throws list

- Throw RestApiException instead of the many subtypes.
- Replace Exception with the missing specific types.

Do so as a tradeoff around the amount of specific types listed as
thrown. Before this change, Exception was thrown alongside redundant
subtypes.

Change-Id: Ib70528a92aee660bf5af3e38f047e8a7860e6aa4