RFR: 8189338: JMX RMI Remote Mbean server connection hangs if the server stops responding during a SSL Handshake

[Daniel Jeliński]

This patch introduces a time limit for establishing a secure connection to a RMI server.

The existing implementation uses the configured `sun.rmi.transport.tcp.handshakeTimeout` during RMI handshake only; there's no time limit for SSL handshake.
With this patch, the configuration option `sun.rmi.transport.tcp.handshakeTimeout` is also used as a socket read timeout during the SSL handshake.

I modified the existing `HandshakeTimeout` test to verify both non-SSL and SSL connections; the test passes with my changes, fails without them.

Existing tier1-3 tests continue to pass.

While working on the patch I noticed that `conn.isReusable()` always returns true. I can remove all references to `isReusable` here or in another PR; it would simplify the code a bit.

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Commit messages:
 - Copyright
 - RMI SSL timeout

Changes: https://git.openjdk.org/jdk/pull/11829/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=11829&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8189338
  Stats: 41 lines in 2 files changed: 23 ins; 13 del; 5 mod
  Patch: https://git.openjdk.org/jdk/pull/11829.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/11829/head:pull/11829

PR: https://git.openjdk.org/jdk/pull/11829