Expose auth validator functionality for wrapper (#416)

* expose auth validator functionality for wrapper

* Add REST validation after keys set, package account types for future syncing

* Add transient error checking for initial creddemtial validation

* fix command types

* Addressed nits from glorious person

* Amalgamate body within error when not between 2xx status, added btcmarket specific auth error check

* nit fix for glorious person

* Format fix

* removed unused code

* check transient first then validate if its an exchange specific authentication error, all others will be disregarded

* Addressed glorious nits

* Addressed glorious nits

* Moved account processing to updateaccountinfo func and added in fetch account info

* Add GRPC Account streaming (NOTE: could not complete until sync item added)

* RM exchange check

* Address xtda nits

* RM comment code

* Fix linter issues

* used most recent protoc version

* lbank linter issues fixed

* Addressed nits and changed len check to range in for loops

* Fixed timeout issue

* thrasher nits addressed

* add string holdings

cmd/exchange_wrapper_coverage/main.go

@@ -111,7 +111,7 @@ func testWrappers(e exchange.IBotExchange) []string {
 		funcs = append(funcs, "UpdateTradablePairs")
 	}
 
-	_, err = e.GetAccountInfo()
+	_, err = e.FetchAccountInfo()
 	if err == common.ErrNotYetImplemented {
 		funcs = append(funcs, "GetAccountInfo")
 	}