RFR[15] JDK-8246709: sun/security/tools/jarsigner/TsacertOptionTest.java compilation failed after JDK-8244683

[sha.jiang at oracle.com]

Hi,
This patch takes TsacertOptionTest.java to use TsaServer directly,
and removes some unnecessary constructors in TsaServer.

Webrev: http://cr.openjdk.java.net/~jjiang/8246709/webrev.00/
Issue: https://bugs.openjdk.java.net/browse/JDK-8246709

Best regards,
John Jiang