Merge branch 'improve-error-message-when-incorrect-versions-are-used' into 'develop'

feat: show given and expected versions when using incorrect version

See merge request !227

common/go/src/asapo_common/utils/version.go

@@ -3,6 +3,7 @@ package utils
 import (
 	"errors"
 	"github.com/gorilla/mux"
+	"fmt"
 	"net/http"
 	"strconv"
 	"strings"
@@ -56,7 +57,11 @@ func PrecheckApiVersion(w http.ResponseWriter, r *http.Request, currentVersion s
 	}
 	curVer,_ := ParseVersion(currentVersion)
 	if ver.Id > curVer.Id {
-		WriteServerError(w, errors.New("version not supported"), http.StatusUnsupportedMediaType)
+		message := fmt.Sprintf(
+			"Version v%d.%d is not supported. Expected version v%d.%d.",
+			ver.Major, ver.Minor, curVer.Major, curVer.Minor,
+		)
+		WriteServerError(w, errors.New(message), http.StatusUnsupportedMediaType)
 		return VersionNum{}, false
 	}
 	return ver, true