reference global logrus (#274)

* reference logrus' global logger instead of passing and storing a logger reference everywhere

* always directly use global logrus logger instead of referencing an instance

* test suites should also directly use the global logrus logger

* rename gin logging function to clarify that it's middleware

* correct comments which erroneously referenced removed logger parameter

* setting log level for tests now uses logrus' exported type instead of the string value, to guarantee error isn't possible

testrig/typeconverter.go

@@ -25,5 +25,5 @@ import (
 
 // NewTestTypeConverter returned a type converter with the given db and the default test config
 func NewTestTypeConverter(db db.DB) typeutils.TypeConverter {
-	return typeutils.NewConverter(NewTestConfig(), db, NewTestLog())
+	return typeutils.NewConverter(NewTestConfig(), db)
 }