Add helper to delete LCE from capsule

nailgun/entities.py

@@ -858,6 +858,34 @@ def content_add_lifecycle_environment(self, synchronous=True, timeout=None, **kw
         response = client.post(self.path('content_lifecycle_environments'), **kwargs)
         return _handle_response(response, self._server_config, synchronous, timeout)
 
+    def content_delete_lifecycle_environment(self, synchronous=True, timeout=None, **kwargs):
+        """Helper to disassociate lifecycle environment from capsule
+
+        Here is an example of how to use this method::
+            capsule.content_delete_lifecycle_environment(data={'environment_id': lce.id})
+
+        Constructs path:
+            /katello/api/capsules/:capsule_id/content/lifecycle_environments/:id
+
+        :param synchronous: What should happen if the server returns an HTTP
+            202 (accepted) status code? Wait for the task to complete if
+            ``True``. Immediately return the server's response otherwise.
+        :param timeout: Maximum number of seconds to wait until timing out.
+            Defaults to ``nailgun.entity_mixins.TASK_TIMEOUT``.
+        :param kwargs: Arguments to pass to requests.
+        :returns: The server's response, with all JSON decoded.
+        :raises: ``requests.exceptions.HTTPError`` If the server responds with
+            an HTTP 4XX or 5XX message.
+
+        """
+        kwargs = kwargs.copy()
+        kwargs.update(self._server_config.get_client_kwargs())
+        path = (
+            f'{self.path("content_lifecycle_environments")}/{kwargs["data"].pop("environment_id")}'
+        )
+        response = client.delete(path, **kwargs)
+        return _handle_response(response, self._server_config, synchronous, timeout)
+
     def content_lifecycle_environments(self, synchronous=True, timeout=None, **kwargs):
         """Helper to get all the lifecycle environments, associated with
         capsule