Begin work to support V4 Lenovo servers

V4 Lenovo servers will have XCC3, and will have differences
and mark an unambiguously redfish capable onboarding process.

For now identify XCC3 variants and mark them, stubbing them
to the xcc handler.

An XCC3 handler will be made basing on the generic redfishbmc handler
with accomodations for XCC specific data (e.g. DeviceDescription
attributes and the Lenovo default user/password choice).

confluent_server/confluent/discovery/core.py

@@ -113,6 +113,7 @@ nodehandlers = {
     'service:lenovo-smm': smm,
     'service:lenovo-smm2': smm,
     'lenovo-xcc': xcc,
+    'lenovo-xcc3': xcc,
     'service:management-hardware.IBM:integrated-management-module2': imm,
     'pxe-client': pxeh,
     'onie-switch': None,
@@ -132,6 +133,7 @@ servicenames = {
     'service:lenovo-smm2': 'lenovo-smm2',
     'affluent-switch': 'affluent-switch',
     'lenovo-xcc': 'lenovo-xcc',
+    'lenovo-xcc3': 'lenovo-xcc3',
     #'openbmc': 'openbmc',
     'service:management-hardware.IBM:integrated-management-module2': 'lenovo-imm2',
     'service:io-device.Lenovo:management-module': 'lenovo-switch',
@@ -147,6 +149,7 @@ servicebyname = {
     'lenovo-smm2': 'service:lenovo-smm2',
     'affluent-switch': 'affluent-switch',
     'lenovo-xcc': 'lenovo-xcc',
+    'lenovo-xcc3': 'lenovo-xcc3',
     'lenovo-imm2': 'service:management-hardware.IBM:integrated-management-module2',
     'lenovo-switch': 'service:io-device.Lenovo:management-module',
     'thinkagile-storage': 'service:thinkagile-storagebmc',

confluent_server/confluent/discovery/protocols/ssdp.py

@@ -431,18 +431,25 @@ def check_fish(urldata, port=443, verifycallback=None):
     url, data = urldata
     try:
         wc = webclient.SecureHTTPConnection(_get_svrip(data), port, verifycallback=verifycallback, timeout=1.5)
-        peerinfo = wc.grab_json_response(url)
+        peerinfo = wc.grab_json_response(url, headers={'Accept': 'application/json'})
     except socket.error:
         return None
     if url == '/DeviceDescription.json':
+        if not peerinfo:
+            return None
         try:
             peerinfo = peerinfo[0]
+        except KeyError:
+            peerinfo['xcc-variant'] = '3'
+        except IndexError:
++            return None
+        try:
             myuuid = peerinfo['node-uuid'].lower()
             if '-' not in myuuid:
                 myuuid = '-'.join([myuuid[:8], myuuid[8:12], myuuid[12:16], myuuid[16:20], myuuid[20:]])
             data['uuid'] = myuuid
             data['attributes'] = peerinfo
-            data['services'] = ['lenovo-xcc']
+            data['services'] = ['lenovo-xcc'] if 'xcc-variant' not in peerinfo else ['lenovo-xcc' + peerinfo['xcc-variant']]
             return data
         except (IndexError, KeyError):
             return None