Unable to import some benchmarks due to incorrect names of qreg and cregs

[hrushikesh890]

While load qasm files from small/ folder, we encounter following error

Error loading vqe_uccsd_n4.qasm: "<input>:2286,8: 'q' is not defined in this scope"
Error loading vqe_uccsd_n6.qasm: "<input>:2286,8: 'q' is not defined in this scope"
Error loading hhl_n10.qasm: "<input>:186801,8: 'q' is not defined in this scope"
Error loading vqe_uccsd_n8.qasm: "<input>:10813,8: 'q' is not defined in this scope"
Error loading hhl_n10.qasm: "<input>:186801,8: 'q' is not defined in this scope"
Error loading vqe_uccsd_n8.qasm: "<input>:10813,8: 'q' is not defined in this scope"```

The root cause is in most of these qasm files the qreg is named reg instead of q.