fix sample pulse normalization. (#4613)
fix sample pulse normalization. (#4613)

Co-authored-by: Luciano Bello <e038f7a74cc380eed3dcb32b96cec8e184cd69ed@ibm.com>
QISKit/qiskit-sdk-py,QISKit/qiskit-sdk-py,QISKit/qiskit-sdk-py