Do not serialize command_params

The command params can be huge when configdrive is used. There is no
point in sending them back, Ironic does not use them anyhow.

Story: #2008904
Task: #42479
Change-Id: I6e3db5db2042ca3fb5dafacfacf036fd7fc2fc4c

ironic_python_agent/extensions/base.py

@@ -42,7 +42,7 @@ class AgentCommandStatus(object):
 class BaseCommandResult(encoding.SerializableComparable):
     """Base class for command result."""
 
-    serializable_fields = ('id', 'command_name', 'command_params',
+    serializable_fields = ('id', 'command_name',
                            'command_status', 'command_error', 'command_result')
 
     def __init__(self, command_name, command_params):

ironic_python_agent/tests/unit/test_agent.py

@@ -742,9 +742,6 @@ class TestBaseAgent(ironic_agent_base.IronicAgentTest):
         expected_result = {
             'id': result.id,
             'command_name': 'foo_command',
-            'command_params': {
-                'fail': False,
-            },
             'command_status': 'RUNNING',
             'command_result': None,
             'command_error': None,
@@ -766,9 +763,6 @@ class TestBaseAgent(ironic_agent_base.IronicAgentTest):
         expected_result = {
             'id': result.id,
             'command_name': 'foo_command',
-            'command_params': {
-                'fail': True,
-            },
             'command_status': 'RUNNING',
             'command_result': None,
             'command_error': None,

releasenotes/notes/command_params-869fa547b5be2236.yaml

@@ -0,0 +1,5 @@
+---
+fixes:
+  - |
+    The command params no longer appear in the command results. See `story
+    2008904 <https://storyboard.openstack.org/#!/story/2008904>`_ for details.