java/net/httpclient/http2/BasicTest.java (JDK-8157408)

Test is known to fail intermittently, it should be marked accordingly with

    @key intermittent

jtreg tag in the test file.

There are some other httpclient tests failing intermittently, you may want to mark them as well. For example:
java/net/httpclient/http2/ErrorTest.java (JDK-8158127)
java/net/httpclient/http2/TLSConnection.java (JDK-8157482)
java/net/httpclient/SplitResponse.java (JDK-8157533)