git: openjdk/mobile: 8235514: Update record serialization tests to not use hard coded source versions

[duke]

Changeset: e1921502
Author:    Joe Darcy <darcy at openjdk.org>
Date:      2019-12-06 13:32:46 +0000
URL:       https://git.openjdk.java.net/mobile/commit/e1921502

8235514: Update record serialization tests to not use hard coded source versions

Reviewed-by: lancea

! test/jdk/java/io/Serializable/records/BadCanonicalCtrTest.java
! test/jdk/java/io/Serializable/records/ProhibitedMethods.java
! test/jdk/java/io/Serializable/records/SerialPersistentFieldsTest.java