os.environ throws TypeError

[stigerasmussen]

Steps to reproduce the problem

The os.environ["QISKIT_BRAKET_PROVIDER_MAX_DELAY"] must be set as a string, meaning that when it is set and the _get_result_from_aws_tasks is called, then the retry decorator throws a TypeError since it cannot compare an int and a str.

What is the current behavior?

TypeError is raised when os.environ["QISKIT_BRAKET_PROVIDER_MAX_DELAY"] is set.

What is the expected behavior?

Place an int() in the retry decorator to eliminate the problem.

[stigerasmussen]

This would probably also also fix #57