Updates the data for each request and step to form transaction step xml and append it to the business transaction xml.
      Syntax
         
            public virtual Boolean 
            updateRequestElementWithValue:::
            (SUPE2ETraceRequest * theRequest, NSString * Value, NSString * forKey)
         
      
      Parameters
         
            - 
               request – 
               current tracerequest
            
 
            - 
               Value – 
               step and tracerequest object value
            
 
            - 
               key – 
               step and tracerequest object key