Fixed CvalChecker invalid version message (#17879)

Change-Id: I2eed6d907be299ebca3e69d7f492aff6f1244fe4

client-compiler/src/com/vaadin/tools/CvalChecker.java

             String msg = "";
             int majorVers = computeMajorVersion(version);
 
-            if (info != null && info.getMessage() != null) {
+            if (info != null && !info.isValidVersion(majorVers)) {
+                msg = getErrorMessage("invalid", title, majorVers);
+            } else if (info != null && info.getMessage() != null) {
                 msg = info.getMessage().replace("\\n", "\n");
             } else if (info != null && info.isLicenseExpired()) {
                 String type = "evaluation".equals(info.getType()) ? "Evaluation license"

client-compiler/tests/src/com/vaadin/tools/CvalCheckerTest.java

 import static com.vaadin.tools.CvalChecker.parseJson;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNull;
+import static org.junit.Assert.assertTrue;
 
 import java.io.ByteArrayOutputStream;
 import java.io.File;
             Assert.fail();
         } catch (InvalidCvalException expected) {
             assertEquals(productNameCval, expected.name);
+            assertTrue(expected.getMessage().contains("is not valid"));
         }
         Assert.assertFalse(cacheExists(productNameCval));