git: openjdk/jdk-sandbox: simpleserver: some more test cases and cleanup

[Julia Boes]

Changeset: 81121148
Author:    Julia Boes <julia.boes at oracle.com>
Date:      2021-07-05 15:11:17 +0000
URL:       https://git.openjdk.java.net/jdk-sandbox/commit/8112114860765e44685c290ec97bc81532cd568e

some more test cases and cleanup

! src/jdk.httpserver/share/classes/sun/net/httpserver/simpleserver/FileServerHandler.java
! test/jdk/com/sun/net/httpserver/FilterTest.java
! test/jdk/com/sun/net/httpserver/simpleserver/CommandLineNegativeTest.java
! test/jdk/com/sun/net/httpserver/simpleserver/CommandLinePositiveTest.java
! test/jdk/com/sun/net/httpserver/simpleserver/HttpsServerTest.java
! test/jdk/com/sun/net/httpserver/simpleserver/SimpleFileServerTest.java
! test/jdk/com/sun/net/httpserver/simpleserver/ToolProviderNegativeTest.java
! test/jdk/com/sun/net/httpserver/simpleserver/ToolProviderPositiveTest.java