RFR: 8264190: Harden TLS interop tests

[Fernando Guallini]

Occasional interop tests failures may occur when making use of the test/jdk/javax/net/ssl/TLSCommon/interop framework since there is no assurance the selected available port it is still free at the time a server using the framework starts up, for instance, by command line. To mitigate intermittent failures, this patch updates interop/BaseInteropTest.java in order to validate the server is alive and if not, retry to create a valid server.

In addition, Utilities::isSessionResumed implementation is now comparing equality of first and second session creation time to validate session resumption

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Commit messages:
 - Harden TLS interop tests

Changes: https://git.openjdk.java.net/jdk/pull/3218/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=3218&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8264190
  Stats: 28 lines in 4 files changed: 19 ins; 1 del; 8 mod
  Patch: https://git.openjdk.java.net/jdk/pull/3218.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/3218/head:pull/3218

PR: https://git.openjdk.java.net/jdk/pull/3218