'For keeping same behavior with v2 API, ignores microversions
HTTP headers X-OpenStack-Nova-API-Version and OpenStack-API-Version
in the request.'

def _filter_request_headers(self, req):

    if (wsgi.API_VERSION_REQUEST_HEADER in req.headers):
        del req.headers[wsgi.API_VERSION_REQUEST_HEADER]
    if (wsgi.LEGACY_API_VERSION_REQUEST_HEADER in req.headers):
        del req.headers[wsgi.LEGACY_API_VERSION_REQUEST_HEADER]
    return req
