Test refactoring and additions to support API Testing (#205)

* move wallet tests into integration module in advance of further test creation, add v3 API

* rustfmt

* fix return value from incorrect mask supplied

* rustfmt

* rework send request call some

* rustfmt

* more refactoring, turn proxy startup + wallet init into macros

* rustfmt

* move sample requests into subdirectories

* add missing wallet files, change gitignore

.gitignore

@@ -10,5 +10,4 @@ target
 grin.log
 wallet.seed
 test_output
-wallet*
 .idea/