title: jmeter header manager remove header
body: <p>I have a large and deep test and am using jmeter 2.1.3.</p>
  
  <p>I have a default http header manager at the top level and inherited for all the samplers below. </p>
  
  <p>Deep in the test structure i need to make an http request and remove all the headers inherited from the parent manager. </p>
  
  <p>The docs say this is achieved by creating a child manager for this sample and declaring the header with a null value, however this just sends a null value over the air and doesnt strip the header completely from the request. </p>
  
  <p>Any ideas? I really dont want to create a child manager for every sample just to over come this issue as im often tweaking the values to 99% of the samples</p>