The check for extensions was not using a machine readable format for
output. This meant an API check could match on a substring, e.g. a check
for 'qos' would match on 'qos-specs'. Address this issue by switching
our command invocation to use JSON output and migrating the check
function from the general base class to the networking base class.
Change-Id: Idc6dc54503031ddf3e148f50ed53ad8898f7a7e3
Signed-off-by: Stephen Finucane <stephenfin@redhat.com>
c251cb89a5