RFR: 8164804: sun/security/ssl/SSLSocketImpl/CloseSocket.java makes not reliable time assumption [v2]

[Fernando Guallini]

> test sun/security/ssl/SSLSocketImpl/CloseSocket.java verifies the behavior when a server closes the socket connection during a handshake. The server was waiting a fixed 100ms before closing it, but there was no guarantee that the client started the handshake before or during that time frame 
> 
> With this changeset, the server is checking whether the client thread has initiated handshake, and retrying if needed after waiting a short time. In addition, the test is now reusing SSLSocketTemplate to simplify sockets configuration and client/server synchronization

Fernando Guallini has updated the pull request incrementally with one additional commit since the last revision:

  var volatile

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/3856/files
  - new: https://git.openjdk.java.net/jdk/pull/3856/files/43a97f64..300ac1ad

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=3856&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=3856&range=00-01

  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk/pull/3856.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/3856/head:pull/3856

PR: https://git.openjdk.java.net/jdk/pull/3856