fix remote console function for thinkserver

https://gitlab.icelab.lenovo.com/pygcon/pyghmi/commit/6f9e457b5b5767ff51ed93d90d45974a0b8e6087 Fix remote console function for thinkserver

Adds conn.cookies = {} to erase the cookies stored by the webclient.
We do not want to use it's cookies management mechanism, since it will
erase an authentication cookie we need to pass in a following request.

Change-Id: I26e3599caff5c6159ec798b62e972747f0a4109f

pyghmi/ipmi/oem/lenovo/handler.py

@@ -792,6 +792,7 @@ class OEMHandler(generic.OEMHandler):
         conn.request('POST', '/rpc/WEBSES/create.asp', params, headers)
         rsp = conn.getresponse()
         if rsp.status == 200:
+            conn.cookies = {}
             body = rsp.read().split('\n')
             session_line = None
             for line in body: