Add delete_agent to NetworkClientJSON

This patchset add delete_agent method that implements respective API [1]

[1] https://developer.openstack.org/api-ref/network/v2/index.html#delete-agent

Change-Id: I0f4927944cb48a19eb8cdff5312557b3ba044420
Closes-Bug: 1792007

neutron_tempest_plugin/services/network/json/network_client.py

@@ -461,6 +461,12 @@ class NetworkClientJSON(service_client.RestClient):
         body = jsonutils.loads(body)
         return service_client.ResponseBody(resp, body)
 
+    def delete_agent(self, agent_id):
+        uri = '%s/agents/%s' % (self.uri_prefix, agent_id)
+        resp, body = self.delete(uri)
+        self.expected_success(204, resp.status)
+        return service_client.ResponseBody(resp, body)
+
     def list_routers_on_l3_agent(self, agent_id):
         uri = '%s/agents/%s/l3-routers' % (self.uri_prefix, agent_id)
         resp, body = self.get(uri)

releasenotes/notes/agents-client-delete-method-de1a7fb3f845999c.yaml

@@ -0,0 +1,7 @@
+---
+features:
+  - |
+    Added a new method ``delete_agent`` to the AgentsClient class that
+    implements agent deletion according to the neutron API.
+    https://developer.openstack.org/api-ref/network/v2/index.html#delete-agent
+