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

tests/data/v3_reqs/retrieve_info.req.json

@@ -0,0 +1,10 @@
+{
+	"jsonrpc": "2.0",
+	"method": "retrieve_summary_info",
+	"params": {
+		"token": null,
+		"refresh_from_node": true,
+		"minimum_confirmations": 1
+	},
+	"id": 1
+}