Resolved JERSEY-1723.

- Implemented support for client-side JAX-RS SSL context setting API.
- Added a couple of ClientBuilder unit tests.
- Introduced SslConfigurator facility (ported from Grizzly SSLContextConfigurator).
- Removed proprietary SslConfig support.
- Updated existing SSL context usages to use the new API.
- Migrated (unrelated) https-server-glassfish example from 1.x as required by the issue desc.
    - Created new separate task JERSEY-1773 to complete & verify the migration.

Change-Id: Id117066aca4d559e33ef4329431c41c15afc955d
Signed-off-by: Marek Potociar <marek.potociar@oracle.com>
Merge "Resolved JERSEY-1723."