Break out integration tests

[christroutner]

Unit tests and integration tests are combined in the same files. The scope of this issue is to separate the unit and integration tests into separate files. As an added feature, integration tests will be further separated into mainnet and testnet tests.

Once complete, this will allow developers to quickly test down-stream infrastructure wrapped by rest. To test and see if any one of the multiple downstream pieces of infrastructure is misbehaving. It will also handle the separate mainnet and testnet infrastructure.

The final result is a way for the team to quickly identify issues with rest.

[christroutner]

Issue #537 should be completed before starting work on this issue.

[christroutner]

I will create a feature branch, and implement this change for just the Insight Address library, to show off what the pattern would look like.