RFR: 8263342: Add --connect option to jhsdb hsdb/clhsdb [v2]

[Yasumasa Suenaga]

> Most of subcommands in jhsdb supports to connect to debug server via `--connect` command line option, however `hsdb` and `clhsdb` do not accept it.
> 
> Both HSDB and CLHSDB support to connect to debug server, so they should have capability to do it via command line option.
> 
> I also filed [CSR for this issue](https://bugs.openjdk.java.net/browse/JDK-8263345). Please review it as well.

Yasumasa Suenaga has updated the pull request incrementally with one additional commit since the last revision:

  Update testcase name

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/2908/files
  - new: https://git.openjdk.java.net/jdk/pull/2908/files/2afba98f..0a0c7895

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=2908&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=2908&range=00-01

  Stats: 3 lines in 1 file changed: 0 ins; 0 del; 3 mod
  Patch: https://git.openjdk.java.net/jdk/pull/2908.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/2908/head:pull/2908

PR: https://git.openjdk.java.net/jdk/pull/2908