Enable PluginJobs (#10198)

model/job.go

@@ -55,6 +55,7 @@ func (j *Job) IsValid() *AppError {
 	case JOB_TYPE_LDAP_SYNC:
 	case JOB_TYPE_MESSAGE_EXPORT:
 	case JOB_TYPE_MIGRATIONS:
+	case JOB_TYPE_PLUGINS:
 	default:
 		return NewAppError("Job.IsValid", "model.job.is_valid.type.app_error", nil, "id="+j.Id, http.StatusBadRequest)
 	}