git: openjdk/jdk11u-dev: 8210908: Refactor java/util/prefs/PrefsSpi.sh to plain java test

[Aleksey Shipilev]

Changeset: 97930e74
Author:    Aleksey Shipilev <shade at openjdk.org>
Date:      2021-08-13 07:21:06 +0000
URL:       https://git.openjdk.java.net/jdk11u-dev/commit/97930e74ecf1007742ac1fc0c9fc5ea5d89695a0

8210908: Refactor java/util/prefs/PrefsSpi.sh to plain java test

Reviewed-by: phh
Backport-of: 6ce0aeb00b10738b25f0f53ff785bfc099ef28c4

! test/jdk/java/util/prefs/PrefsSpi.java
- test/jdk/java/util/prefs/PrefsSpi.sh
+ test/jdk/java/util/prefs/PrefsSpiTest.java
+ test/jdk/java/util/prefs/StubPreferences.java
+ test/jdk/java/util/prefs/StubPreferencesFactory.java