Tolerate more standard variations

There are more variations on key parameters, tolerate the
distinct responses consistent with existing replies of
similar purpose.

Change-Id: I22c3ecf7b78213cc9b0c1b8c88deb91251c1facd

pyghmi/ipmi/command.py

@@ -771,7 +771,12 @@ class Command(object):
         one byte, return the int value
         """
         fetchcmd = bytearray((channel, param, 0, 0))
-        fetched = self.xraw_command(0xc, 2, data=fetchcmd)
+        try:
+            fetched = self.xraw_command(0xc, 2, data=fetchcmd)
+        except exc.IpmiException as ie:
+            if ie.ipmicode == 0x80:
+                return None
+            raise
         fetchdata = fetched['data']
         if bytearray(fetchdata)[0] != 17:
             return None

pyghmi/ipmi/fru.py

@@ -133,7 +133,7 @@ class FRU(object):
             try:
                 self.fetch_fru(fruid)
             except iexc.IpmiException as ie:
-                if ie.ipmicode in (203, 129):
+                if ie.ipmicode in (195, 201, 203, 129):
                     return
                 raise
             self.parsedata()

pyghmi/redfish/oem/generic.py

@@ -118,19 +118,32 @@ class OEMHandler(object):
         }
         yield ('System', sysinfo)
         self._hwnamemap = {}
+        cpumemurls = []
         memurl = self._varsysinfo.get('Memory', {}).get('@odata.id', None)
+        if memurl:
+            cpumemurls.append(memurl)
         cpurl = self._varsysinfo.get('Processors', {}).get('@odata.id', None)
-        list(self._do_bulk_requests([memurl, cpurl]))
+        if cpurl:
+            cpumemurls.append(cpurl)
+        list(self._do_bulk_requests(cpumemurls))
         adpurls = self._get_adp_urls()
-        cpurls = self._get_cpu_urls()
-        memurls = self._get_mem_urls()
+        if cpurl:
+            cpurls = self._get_cpu_urls()
+        else:
+            cpurls = []
+        if memurl:
+            memurls = self._get_mem_urls()
+        else:
+            memurls = []
         diskurls = self._get_disk_urls()
         allurls = adpurls + cpurls + memurls + diskurls
         list(self._do_bulk_requests(allurls))
-        for cpu in self._get_cpu_inventory(withids=withids, urls=cpurls):
-            yield cpu
-        for mem in self._get_mem_inventory(withids=withids, urls=memurls):
-            yield mem
+        if cpurl:
+            for cpu in self._get_cpu_inventory(withids=withids, urls=cpurls):
+                yield cpu
+        if memurl:
+            for mem in self._get_mem_inventory(withids=withids, urls=memurls):
+                yield mem
         for adp in self._get_adp_inventory(withids=withids, urls=adpurls):
             yield adp
         for disk in self._get_disk_inventory(withids=withids, urls=diskurls):