Fallback to SSH if ping fails

While trying to work out a test case and using the tempest
plugin to exercise a centos VM, I noticed it didn't ping,
when I had previously done other work to the VM. It has
SSH'ed, it might have failed, but try to SSH in case ping
fails.

Change-Id: I4e125529de4ff96c42194f91b18281a642a30018
diff --git a/ironic_tempest_plugin/tests/scenario/test_baremetal_basic_ops.py b/ironic_tempest_plugin/tests/scenario/test_baremetal_basic_ops.py
index 010c220..2a36c6a 100644
--- a/ironic_tempest_plugin/tests/scenario/test_baremetal_basic_ops.py
+++ b/ironic_tempest_plugin/tests/scenario/test_baremetal_basic_ops.py
@@ -240,8 +240,16 @@
         # Reboot node
         self.reboot_node(self.instance)
 
-        # ensure we can ping the node again
-        self.assertTrue(self.ping_ip_address(ip_address))
+        # Ensure we have some sort of connectivity
+        # Attempt to ping, if all else fails fall back to an ssh connection
+        # which worked previously.
+        pinging = self.ping_ip_address(ip_address)
+        if not pinging:
+            self.get_remote_client(ip_address, server=self.instance)
+        else:
+            # If we're here, this is successful. If ssh fails above,
+            # the job will ultimately fail.
+            self.assertTrue(pinging)
 
         self.terminate_instance(self.instance)