hg: jdk/submit: 8193802: NullPointerException from JarFileSystem.getVersionMap()

[xueming.shen at oracle.com]

Changeset: 554cb38e0caf
Author:    sherman
Date:      2018-01-31 14:21 -0800
URL:       http://hg.openjdk.java.net/jdk/submit/rev/554cb38e0caf

8193802: NullPointerException from JarFileSystem.getVersionMap()
Reviewed-by: mchung

! src/jdk.zipfs/share/classes/jdk/nio/zipfs/JarFileSystem.java
! test/jdk/jdk/nio/zipfs/MultiReleaseJarTest.java