Added jsonschema package as a development depedency. It's only used in tests for now.
Added jsonschema package as a development depedency. It's only
used in tests for now.

atilag/qiskit-sdk-py,QISKit/qiskit-sdk-py,atilag/qiskit-sdk-py,atilag/qiskit-sdk-py,QISKit/qiskit-sdk-py,QISKit/qiskit-sdk-py