revert httpreplay lib to unblock release.

Squashed commit of the following:

commit 7c6bdc73f819821cfb0d85c6ae5e8595d0793767
Author: Yuanshu Yun <[email protected]>
Date:   Thu Nov 8 20:09:15 2018 -0800

    revert httpreplay lib since it's not ready to publish.

Author: neverdreams

.gitignore

@@ -23,4 +23,3 @@ debug.test
 docs/solutions/rhel74_image/ipxe.sh
 vendor/github.com/oracle/oci-go-sdk/target
 *.test
-oci/record/