Fix some redfish incompatibilities

Some implementations require etag to set the identify light.

Some implementations do not provide the allowable reset values up
front and require chasing yet another url.

Fix an issue where a temperature sensor
without available reading caused an error.

Change-Id: Ie0b3c880b311438938d016857e4466c55447f7a3

pyghmi/redfish/command.py

@@ -773,6 +773,12 @@ class Command(object):
                                                  {})
             url = resetinf.get('target', '')
             valid = resetinf.get('ResetType@Redfish.AllowableValues', [])
+            if not valid:
+                tmpurl = resetinf.get('@Redfish.ActionInfo', None)
+                if tmpurl:
+                    resetinf = self._do_web_request(tmpurl)
+                    valid = resetinf.get('Parameters', [{}])[0].get(
+                        'AllowableValues')
             resettype = None
             if 'GracefulRestart' in valid:
                 resettype = 'GracefulRestart'
@@ -792,10 +798,11 @@ class Command(object):
         self._do_web_request(url, {'ResetType': action})
 
     def set_identify(self, on=True, blink=None):
+        thetag = self.sysinfo.get('@odata.etag', None)
         self._do_web_request(
             self.sysurl,
             {'IndicatorLED': 'Blinking' if blink else 'Lit' if on else 'Off'},
-            method='PATCH')
+            method='PATCH', etag=thetag)
 
     _idstatemap = {
         'Blinking': 'blink',
@@ -1499,7 +1506,7 @@ class Command(object):
                         unavailable=unavail)
         elif sensor['type'] == 'Temperature':
             for temp in reading['Temperatures']:
-                if temp['Name'] == sensor['name'] and 'ReadingCelsius' in temp:
+                if temp['Name'] == sensor['name']:
                     val = temp.get('ReadingCelsius', None)
                     unavail = val is None
                     return SensorReading(