RFR: JDK-8326898: NSK tests should listen on loopback addresses only [v2]

[Alex Menkov]

> Many NSK tests create socket channel for test/target interprocess communication.
> The change updates server side to listen only on loopback interface.
> 
> Testing - all tests that use then functionality:
>  - test/hotspot/jtreg/vmTestbase/nsk/jdb, test/hotspot/jtreg/vmTestbase/nsk/jdi, test/hotspot/jtreg/vmTestbase/nsk/jdwp, test/hotspot/jtreg/vmTestbase/nsk/aod, test/hotspot/jtreg/vmTestbase/nsk/jvmti/AttachOnDemand

Alex Menkov has updated the pull request incrementally with one additional commit since the last revision:

  SocketIOPipe.createClientIOPipe and getTestHost()/getDebugeeHost()

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Changes:
  - all: https://git.openjdk.org/jdk/pull/18053/files
  - new: https://git.openjdk.org/jdk/pull/18053/files/8d204ba7..719e2e65

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=18053&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=18053&range=00-01

  Stats: 17 lines in 5 files changed: 1 ins; 0 del; 16 mod
  Patch: https://git.openjdk.org/jdk/pull/18053.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18053/head:pull/18053

PR: https://git.openjdk.org/jdk/pull/18053