hg: jdk/jdk: 8190987: Package.getImplementationVersion returns null even if implementation version is non-null

[mandy.chung at oracle.com]

Changeset: 09ad9dd26857
Author:    mchung
Date:      2017-11-16 22:51 -0600
URL:       http://hg.openjdk.java.net/jdk/jdk/rev/09ad9dd26857

8190987: Package.getImplementationVersion returns null even if implementation version is non-null
Reviewed-by: mchung, rriggs
Contributed-by: Michael Dardis <me at md-5.net>

! src/java.base/share/classes/java/lang/Package.java
+ test/jdk/java/lang/Package/PackageVersionTest.java