merge develop to solve conflict third times, test=develop

paddle/fluid/imperative/layer.h

@@ -568,7 +568,7 @@ class OpBase {
   void CheckAttrs() {
     auto& info = op_->Info();
     if (info.Checker() != nullptr) {
-      info.Checker()->Check(&attrs_);
+      info.Checker()->Check(&attrs_, true);
     }
   }
 

paddle/fluid/imperative/tracer.cc

@@ -92,7 +92,7 @@ void Tracer::TraceOp(const std::string& type, const NameVarBaseMap& ins,
   const auto& op_info = op->Info();
   auto* attr_checker = op_info.Checker();
   if (attr_checker) {
-    attr_checker->Check(&attrs);
+    attr_checker->Check(&attrs, true);
   }
 
   OpBase::Run(*op, ins, outs, attrs, place);