Fix mapping of default output type to json (#93)

diff --git a/cmd/output.go b/cmd/output.go
index 3279c8c..f221e03 100644
--- a/cmd/output.go
+++ b/cmd/output.go
@@ -254,6 +254,8 @@
 		printCsv(response, filter)
 	case config.TABLE:
 		printTable(response, filter)
+	case config.DEFAULT:
+		printJSON(response)
 	default:
 		fmt.Println("Invalid output type configured, please fix that!")
 	}
diff --git a/config/config.go b/config/config.go
index 0e7e78e..5141df6 100644
--- a/config/config.go
+++ b/config/config.go
@@ -40,6 +40,7 @@
 	JSON   = "json"
 	TABLE  = "table"
 	TEXT   = "text"
+	DEFAULT= "default"
 )
 
 // ServerProfile describes a management server
@@ -75,7 +76,7 @@
 }
 
 func GetOutputFormats() []string {
- return []string {"column", "csv", "json", "table", "text"}
+ return []string {"column", "csv", "json", "table", "text", "default"}
 }
 
 func CheckIfValuePresent(dataset []string, element string) bool {