Add qobj conditional support BasicAer (#1955)
Add qobj conditional support BasicAer (#1955)

* BasicAer: Add qobj-style registers to QASM simulator.

* BasicAer: Standardize cmembit and cregbit naming in QASM simulator.

* BasicAer: Add support for measuring to a register in QASM simulator.

* BasicAer: Add bfunc support to QASM simulator.

* BasicAer: Add dual support for qasm- and qobj-style conditionals.

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