exe installers created by jpackage in jtreg tests are not installed if unpack action is in the action sequence which is the default setting.

Unpacking is only supported for msi installers. There is no handler for unpack action for exe installers. This results in premature abortion of actions sequenced for test execution. "unpack" action goes before "install" in the default action sequence, thus exe installers are never installed.

The issue was introduced in JDK-823370 when support for the unpacking of installers was added.