[copporch]: fix the endless loop problem when removing copp table group. (#1038)

Signed-off-by: wangshengjun <[email protected]>

Author: wangshengjun

orchagent/copporch.cpp

@@ -628,13 +628,15 @@ void CoppOrch::doTask(Consumer &consumer)
                 it = consumer.m_toSync.erase(it);
                 break;
             case task_process_status::task_failed:
+                it = consumer.m_toSync.erase(it);
                 SWSS_LOG_ERROR("Processing copp task item failed, exiting. ");
                 return;
             case task_process_status::task_need_retry:
                 SWSS_LOG_ERROR("Processing copp task item failed, will retry.");
                 it++;
                 break;
             default:
+                it = consumer.m_toSync.erase(it);
                 SWSS_LOG_ERROR("Invalid task status:%d", task_status);
                 return;
         }