hg: jdk/sandbox: 8235955: [dmg] DMG creation fails without error message if previous DMG was not ejected

[chris.hegarty at oracle.com]

Changeset: c61cd64e09ac
Author:    almatvee
Date:      2020-01-21 08:46 -0500
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/c61cd64e09ac

8235955: [dmg] DMG creation fails without error message if previous DMG was not ejected
Reviewed-by: herrick, asemenyuk

! src/jdk.incubator.jpackage/macosx/classes/jdk/incubator/jpackage/internal/MacDmgBundler.java
! src/jdk.incubator.jpackage/macosx/classes/jdk/incubator/jpackage/internal/resources/DMGsetup.scpt