Merge import tests folder from hive

tests2/.dockerignore

tests2/CMakeLists.txt

tests2/README.md

tests2/api_tests/.gitignore

tests2/api_tests/CMakeLists.txt

tests2/api_tests/README.md

tests2/api_tests/account_by_key_api/CMakeLists.txt

tests2/api_tests/account_by_key_api/get_key_references.py

tests2/api_tests/account_by_key_api/readme.md

tests2/api_tests/account_history_api/CMakeLists.txt

tests2/api_tests/account_history_api/enum_virtual_ops.py

tests2/api_tests/account_history_api/get_account_history.py

tests2/api_tests/account_history_api/get_ops_in_block.py

tests2/api_tests/account_history_api/get_transaction.py

tests2/api_tests/account_history_api/readme.md

tests2/api_tests/condenser_api/CMakeLists.txt

tests2/api_tests/condenser_api/README.md

tests2/api_tests/condenser_api/broadcast_block.py

tests2/api_tests/condenser_api/broadcast_transaction.py

..._tests/condenser_api/broadcast_transaction_synchronous.py