Add Algod endpoint for GetApplicationBoxByName

[algochoi]

This PR adds API endpoints for GetApplicationBoxByName, and implements cucumber tests for the path names and integration tests for reading boxes from algod.

Path-related tests: algorand/algorand-sdk-testing#187

Integration tests: algorand/algorand-sdk-testing#196

Related to Algod Box API ticket here: algorand/go-algorand#3973

[michaeldiamant]

@algochoi Thanks for your efforts here + taking questions via live discussion. ☕

Friendly reminder that the branch reference in run_integration.sh requires a change after merging algorand/go-algorand#4183.

Up to you if you prefer merging as is + updating later or holding open until upstream PR merges.

[algochoi]

Thanks for the quick feedback:

Friendly reminder that the branch reference in run_integration.sh requires a change after merging algorand/go-algorand#4183. Up to you if you prefer merging as is + updating later or holding open until upstream PR merges.

Per our discussion, I'll merge into the feature branch and leave comments on the parent PR: #348

I think the integration tests will fail until we also merge in the Algod box API changes as well. algorand/go-algorand#4183