Update get_essential_properties() for empty CPU socket

This patch updates get_essential_properties() so that "'NoneType'
object has no attribute 'text'" exception is not thrown when one of
CPU sockets is empty in bare metal server.

Change-Id: Ib5a8f0cd93c03049d1810678fc4ddfbd69b0b499

scciclient/irmc/scci.py

@@ -477,7 +477,8 @@ def get_essential_properties(report, prop_keys):
         [int(int(size.text) / 1000)
          for size in report.findall('.//PhysicalDrive/PhysicalSize')])
     v['cpus'] = sum([int(cpu.find('./CoreNumber').text)
-                     for cpu in report.find('./System/Processor')])
+                     for cpu in report.find('./System/Processor')
+                     if cpu.find('./CoreNumber') is not None])
     # v['cpus'] = sum([int(cpu.find('./LogicalCpuNumber').text)
     #                 for cpu in report.find('./System/Processor')])
     v['cpu_arch'] = 'x86_64'

scciclient/tests/irmc/fixtures/irmc_report_ng.xml

@@ -85,6 +85,10 @@
     <Level2CacheSize Unit="KByte">2048</Level2CacheSize>
     <Level3CacheSize Unit="KByte">20480</Level3CacheSize>
    </CPU>
+   <CPU Boot="false">
+    <SocketDesignation>CPU2</SocketDesignation>
+    <Status Description="empty">0</Status>
+   </CPU>
   </Processor>
   <Memory Schema="2">
    <Installed>8192</Installed>

scciclient/tests/irmc/test_scci.py

@@ -672,3 +672,16 @@ class SCCITestCase(testtools.TestCase):
             self.report_ok_xml, ESSENTIAL_PROPERTIES_KEYS)
 
         self.assertEqual(expected, result)
+
+    def test_get_essential_properties_empty_cpu_socket(self):
+        ESSENTIAL_PROPERTIES_KEYS = {
+            'memory_mb', 'local_gb', 'cpus', 'cpu_arch'}
+        expected = {'memory_mb': 8192,
+                    'local_gb': 190,
+                    'cpus': 16,
+                    'cpu_arch': 'x86_64'}
+
+        result = scci.get_essential_properties(
+            self.report_ng_xml, ESSENTIAL_PROPERTIES_KEYS)
+
+        self.assertEqual(expected, result)