hg: jdk/jdk: 8202719: Use Collections.emptyEnumeration where possible

[claes.redestad at oracle.com]

Changeset: 1c4fb292447c
Author:    redestad
Date:      2018-05-08 09:57 +0200
URL:       http://hg.openjdk.java.net/jdk/jdk/rev/1c4fb292447c

8202719: Use Collections.emptyEnumeration where possible
Reviewed-by: martin, psandoz
Contributed-by: christoph.dreis at freenet.de

! src/java.base/share/classes/java/util/jar/JarFile.java
! src/java.base/share/classes/java/util/jar/JarVerifier.java