hg: jdk/jdk: 8197398: (zipfs) Files.walkFileTree walk indefinitelly while processing JAR file with "/" as a directory inside.

[xueming.shen at oracle.com]

Changeset: 2e4cf4ca074c
Author:    sherman
Date:      2018-09-04 17:04 -0700
URL:       http://hg.openjdk.java.net/jdk/jdk/rev/2e4cf4ca074c

8197398: (zipfs) Files.walkFileTree walk indefinitelly while processing JAR file with "/" as a directory inside.
Reviewed-by: alanb

! src/jdk.zipfs/share/classes/jdk/nio/zipfs/ZipFileSystem.java
! test/jdk/jdk/nio/zipfs/ZFSTests.java