[v4] Update triggers endpoint and attrs

gitlab/v4/objects.py

@@ -1619,7 +1619,7 @@ class ProjectTrigger(GitlabObject):
     _url = '/projects/%(project_id)s/triggers'
     canUpdate = False
     idAttr = 'token'
-    requiredUrlAttrs = ['project_id']
+    requiredUrlAttrs = ['project_id', 'description']
 
 
 class ProjectTriggerManager(BaseManager):
@@ -2087,7 +2087,7 @@ def share(self, group_id, group_access, **kwargs):
         r = self.gitlab._raw_post(url, data=data, **kwargs)
         raise_error_from_response(r, GitlabCreateError, 201)
 
-    def trigger_build(self, ref, token, variables={}, **kwargs):
+    def trigger_pipeline(self, ref, token, variables={}, **kwargs):
         """Trigger a CI build.
 
         See https://gitlab.com/help/ci/triggers/README.md#trigger-a-build
@@ -2101,7 +2101,7 @@ def trigger_build(self, ref, token, variables={}, **kwargs):
             GitlabConnectionError: If the server cannot be reached.
             GitlabCreateError: If the server fails to perform the request.
         """
-        url = "/projects/%s/trigger/builds" % self.id
+        url = "/projects/%s/trigger/pipeline" % self.id
         form = {r'variables[%s]' % k: v for k, v in six.iteritems(variables)}
         data = {'ref': ref, 'token': token}
         data.update(form)