RFR 8157816, Mark 4 httpclient tests as intermittently failing

[Felix Yang]

Hi all,
   please review the change to mark following tests with keyword 
'intermittent'. These tests have been observed to fail intermittently 
for a while.
test/java/net/httpclient/SplitResponse.java
test/java/net/httpclient/http2/BasicTest.java
test/java/net/httpclient/http2/ErrorTest.java
test/java/net/httpclient/http2/TLSConnection.java
Bug:  https://bugs.openjdk.java.net/browse/JDK-8157816
Webrev: http://cr.openjdk.java.net/~xiaofeya/8157816/webrev.00/

Thanks,
Felix

Also attached the diff:

diff -r ee29aaab5889 test/java/net/httpclient/SplitResponse.java
--- a/test/java/net/httpclient/SplitResponse.java       Mon May 30 
14:58:59 2016 +0900
+++ b/test/java/net/httpclient/SplitResponse.java       Sun May 29 
23:49:16 2016 -0700
@@ -33,6 +33,7 @@
 /**
  * @test
  * @bug 8087112
+ * @key intermittent
  * @build Server
  * @run main/othervm -Djava.net.HttpClient.log=all SplitResponse
  */
diff -r ee29aaab5889 test/java/net/httpclient/http2/BasicTest.java
--- a/test/java/net/httpclient/http2/BasicTest.java     Mon May 30 
14:58:59 2016 +0900
+++ b/test/java/net/httpclient/http2/BasicTest.java     Sun May 29 
23:49:16 2016 -0700
@@ -24,6 +24,7 @@
 /*
  * @test
  * @bug 8087112
+ * @key intermittent
  * @library /lib/testlibrary
  * @build jdk.testlibrary.SimpleSSLContext
  * @modules java.httpclient
diff -r ee29aaab5889 test/java/net/httpclient/http2/ErrorTest.java
--- a/test/java/net/httpclient/http2/ErrorTest.java     Mon May 30 
14:58:59 2016 +0900
+++ b/test/java/net/httpclient/http2/ErrorTest.java     Sun May 29 
23:49:16 2016 -0700
@@ -24,6 +24,7 @@
 /*
  * @test
  * @bug 8157105
+ * @key intermittent
  * @library /lib/testlibrary
  * @build jdk.testlibrary.SimpleSSLContext
  * @modules java.httpclient
diff -r ee29aaab5889 test/java/net/httpclient/http2/TLSConnection.java
--- a/test/java/net/httpclient/http2/TLSConnection.java Mon May 30 
14:58:59 2016 +0900
+++ b/test/java/net/httpclient/http2/TLSConnection.java Sun May 29 
23:49:16 2016 -0700
@@ -39,6 +39,7 @@
 /*
  * @test
  * @bug 8150769 8157107
+ * @key intermittent
  * @summary Checks that SSL parameters can be set for HTTP/2 connection
  * @modules java.httpclient
  * @compile/module=java.httpclient java/net/http/Http2Handler.java