add prepare_upgrade_test_env in installation/test_stub.py
add prepare_upgrade_test_env in installation/test_stub.py

zstackio/zstack-woodpecker,zstackorg/zstack-woodpecker,zstackio/zstack-woodpecker,zstackio/zstack-woodpecker,zstackorg/zstack-woodpecker,zstackorg/zstack-woodpecker