The response data of nova get_xxx_console API is changed
from "console" to "remote_console" in microversion 2.6, and nova
server side API schema verify the spice vnc type to "spice-html5",
update OSC code to apply these change so that OSC can work in
different nova microversion cases.
Change-Id: I3bb4fe057e656209d00d2bb308ac3f7f837cb03f
Closes-Bug: #1590318