[TASK] Deprecate fundHotWallet security reasons
Cold wallet secret should never touch the server!
[TASK] Deprecate currencies api, http, cli

[FOLD] Remove unused currencies test
[TEST] Pass POST /v1/config/hot_wallet
[TEST] Pass generate wallet http test
[TEST] Pass GET /v1/balances
[TEST] Pass http tests

[TASK] Add lint to npm test

[FIX] Include missing test library

[TEST] Pass auth credentials on http tests

[TASK] Setup gatewayd for tests on Travis

[FOLD] Update resposne syntax to express4

[FIX] Lint error

[FIX] Set hot wallet in travis setup.
Merge pull request #502 from ripple/4.0-http-tests

4.0 http tests