RFR: 8263940: NPE when creating default file system when default file system provider is packaged as JAR file on class path

[Lance Andersen]

Hi all,

Please review the fix for JDK-8263940 to address an issues when the default file system provider is packaged as JAR file on class path.

The patch also addresses the `@bug` line for JDK-8271194

Mach5 Tier1 - Tier3 have run without issues

Best,
Lance

-------------

Commit messages:
 - Fix for JDK-8263940

Changes: https://git.openjdk.java.net/jdk/pull/5103/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=5103&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8263940
  Stats: 55 lines in 2 files changed: 49 ins; 2 del; 4 mod
  Patch: https://git.openjdk.java.net/jdk/pull/5103.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/5103/head:pull/5103

PR: https://git.openjdk.java.net/jdk/pull/5103