Fixed the test build for missing const of override function GetServiceRequestName() in AWSClientTest.cpp
Fixed the test build for missing const of override function GetServiceRequestName() in AWSClientTest.cpp

jt70471/aws-sdk-cpp,awslabs/aws-sdk-cpp,awslabs/aws-sdk-cpp,cedral/aws-sdk-cpp,JoyIfBam5/aws-sdk-cpp,awslabs/aws-sdk-cpp,cedral/aws-sdk-cpp,JoyIfBam5/aws-sdk-cpp,aws/aws-sdk-cpp,JoyIfBam5/aws-sdk-cpp,aws/aws-sdk-cpp,aws/aws-sdk-cpp,cedral/aws-sdk-cpp,jt70471/aws-sdk-cpp,jt70471/aws-sdk-cpp,cedral/aws-sdk-cpp,jt70471/aws-sdk-cpp,aws/aws-sdk-cpp,JoyIfBam5/aws-sdk-cpp,JoyIfBam5/aws-sdk-cpp,JoyIfBam5/aws-sdk-cpp,aws/aws-sdk-cpp,cedral/aws-sdk-cpp,aws/aws-sdk-cpp,jt70471/aws-sdk-cpp,awslabs/aws-sdk-cpp,cedral/aws-sdk-cpp,jt70471/aws-sdk-cpp