Allow erase_devices_metadata to be used as a deploy step

Change-Id: I75f156dd76b0e3aaa1592ba24fe42fb2a7057cc8
Story: #2006963

ironic_python_agent/hardware.py

@@ -1583,6 +1583,12 @@ class GenericHardwareManager(HardwareManager):
 
     def get_deploy_steps(self, node, ports):
         return [
+            {
+                'step': 'erase_devices_metadata',
+                'priority': 0,
+                'interface': 'deploy',
+                'reboot_requested': False,
+            },
             {
                 'step': 'apply_configuration',
                 'priority': 0,

ironic_python_agent/tests/unit/test_hardware.py

@@ -881,6 +881,14 @@ class TestGenericHardwareManager(base.IronicAgentTest):
         clean_steps = self.hardware.get_clean_steps(self.node, [])
         self.assertEqual(expected_clean_steps, clean_steps)
 
+    def test_clean_steps_exist(self):
+        for step in self.hardware.get_clean_steps(self.node, []):
+            getattr(self.hardware, step['step'])
+
+    def test_deploy_steps_exist(self):
+        for step in self.hardware.get_deploy_steps(self.node, []):
+            getattr(self.hardware, step['step'])
+
     @mock.patch('binascii.hexlify', autospec=True)
     @mock.patch('ironic_python_agent.netutils.get_lldp_info', autospec=True)
     def test_collect_lldp_data(self, mock_lldp_info, mock_hexlify):

releasenotes/notes/erase-deploy-step-3e952fa863bca908.yaml

@@ -0,0 +1,5 @@
+---
+features:
+  - |
+    The ``deploy.erase_devices_metadata`` clean step can now also be used as
+    a deploy step.