patch 7.4.1720

Problem:    Tests fail without the job feature.
Solution:   Skip tests when the job feature is not present.

src/version.c

@@ -748,6 +748,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1720,
 /**/
     1719,
 /**/