git: openjdk/jdk17: 8268555: Update HttpClient tests that use ITestContext to jtreg 6+1

[Daniel Fuchs]

Changeset: da043e99
Author:    Daniel Fuchs <dfuchs at openjdk.org>
Date:      2021-06-11 08:42:14 +0000
URL:       https://git.openjdk.java.net/jdk17/commit/da043e99b830fa4fcbfdbdbed182abc394ba6fb1

8268555: Update HttpClient tests that use ITestContext to jtreg 6+1

Reviewed-by: chegar

! test/jdk/java/net/httpclient/AbstractThrowingPublishers.java
! test/jdk/java/net/httpclient/AbstractThrowingPushPromises.java
! test/jdk/java/net/httpclient/AbstractThrowingSubscribers.java
! test/jdk/java/net/httpclient/AggregateRequestBodyTest.java
! test/jdk/java/net/httpclient/CancelRequestTest.java
! test/jdk/java/net/httpclient/ForbiddenHeadTest.java
! test/jdk/java/net/httpclient/ISO_8859_1_Test.java
! test/jdk/java/net/httpclient/ProxySelectorTest.java
! test/jdk/java/net/httpclient/Response204V2Test.java
! test/jdk/java/net/httpclient/ShortResponseBody.java