fix move assignment /copy constructor

Author: sbera87

src/aws-cpp-sdk-core/include/smithy/client/AwsSmithyClient.h

@@ -99,13 +99,26 @@ namespace client
             return *this;
         }
 
-        AwsSmithyClientT (AwsSmithyClientT&&) = default;
+        AwsSmithyClientT (AwsSmithyClientT&& other) {
+          //reference can't be moved, so it gets copied first since moving base class member using the reference will cause crash
+          m_clientConfiguration =  other.m_clientConfiguration;
+          AwsSmithyClientBase::operator=(std::move(other));
+          //move other base class members
+          m_endpointProvider = std::move(other.m_endpointProvider);
+          m_authSchemeResolver =  std::move(other.m_authSchemeResolver);
+          m_authSchemes = std::move(other.m_authSchemes);
+          m_serializer = std::move(other.m_serializer);
+          m_errorMarshaller = std::move(other.m_errorMarshaller);
+        }
 
         AwsSmithyClientT& operator=(AwsSmithyClientT&& other) {
           if(this == &other) {
             return *this;
           }
-          m_clientConfiguration = std::move(other.m_clientConfiguration);
+          //reference can't be moved, so it gets copied first since moving base class member using the reference will cause crash
+          m_clientConfiguration =  other.m_clientConfiguration;
+          AwsSmithyClientBase::operator=(std::move(other));
+          //move other base class members
           m_endpointProvider = std::move(other.m_endpointProvider);
           m_authSchemeResolver =  std::move(other.m_authSchemeResolver);
           m_authSchemes = std::move(other.m_authSchemes);