RFR: 8260540: serviceability/jdwp/AllModulesCommandTest.java failed with "Debuggee error: 'ERROR: transport error 202: bind failed: Address already in use'"

[Alex Menkov]

Updated AllModulesCommandTest to use dynamic port launching debuggee.
Parsing debuggee listening address functionality is required in several tests (and we have other tests which need to be fixed the same way), so moved the code to new class in jdk.test.lib

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

Commit messages:
 - JDK-8260540

Changes: https://git.openjdk.java.net/jdk/pull/4560/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=4560&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8260540
  Stats: 121 lines in 7 files changed: 62 ins; 33 del; 26 mod
  Patch: https://git.openjdk.java.net/jdk/pull/4560.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/4560/head:pull/4560

PR: https://git.openjdk.java.net/jdk/pull/4560