HPCC-9802 Add exception release

Signed-off-by: Kevin Wang <kevin.wang@lexisnexis.com>

esp/services/ws_dfu/ws_dfuService.cpp

@@ -1199,6 +1199,7 @@ bool CWsDfuEx::DFUDeleteFiles(IEspContext &context, IEspDFUArrayActionRequest &r
                     emsg.replaceString("Create ", "Delete ");
 
                 returnStr.appendf("<Message><Value>Cannot delete %s: %s</Value></Message>", filename, emsg.str());
+                e->Release();
             }
             catch(...)
             {