🐛 Bug description

When running bash ./test/run_multinode_tests_in_docker.sh

FileNotFoundError: [Errno 2] No such file or directory: 'python3.6' 

This script is not in the CI but is useful to run the distributed tests on a local machine.
Idea would be to make it compatible with pytorch/pytorch:latest, eventually make an inline build of an image with pre-installed tests execution environment, add nnodes, nproc_per_node, gpu as script arguments.

Environment

• PyTorch Version (e.g., 1.4):
• Ignite Version (e.g., 0.3.0):
• OS (e.g., Linux):
• How you installed Ignite (conda, pip, source):
• Python version:
• Any other relevant information: