Fix leak of header buffer in OutboundCall
Fix leak of header buffer in OutboundCall

This is a simple bug fix for the failing tests. This was
missed in the previous commit due to the build issue that
was fixed by 0409ff1d4bdd93a73d996c74a9b8004d8a6b62a5.

Change-Id: I970bce9d874e14f09267ef3fc7cc2b5660623578
Reviewed-on: http://gerrit.ent.cloudera.com:8080/389
Tested-by: jenkins
Reviewed-by: Michael Percy <e07a1fd797b473a9c849e618aa2ce06d8055760b@cloudera.com>

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