fixes bug in extraCards CUNIT3 must be quoted if it has slash: m/s -> 'm/s'

data-access/servlet/src/main/java/common/FitsCard.java

@@ -34,11 +34,11 @@ class FitsCard
    {
       if(csv_vel_unit.equals("m.s**-1"))
       {
-         return new String("m/s");
+         return new String("'m/s'");
       }
       else if(csv_vel_unit.equals("km.s**-1"))
       {
-         return new String("km/s");
+         return new String("'km/s'");
       }
       else
       {