Switched to pyroute2.config.asyncio.asyncio_config
Switched to pyroute2.config.asyncio.asyncio_config

To monkey patch socket module for pyroute2, we call eventlet_config.
In recent releases of the library, this becomes deprecated. Instead, we
should now use asyncio_config() to patch stdlib.

When building module index for tacker docs, it creates a warning,
treated as error: Please use pyroute2.config.asyncio.asyncio_config

Closes-Bug: #1761925
Change-Id: I8f21cfa02e1201f4968ec0ce1fb6865ef591678d

openstack/tacker,openstack/tacker,stackforge/tacker,stackforge/tacker,openstack/tacker