organize structure of tests

hived/condenser_api/list_proposal_votes.py

hived/condenser_api/list_proposals.py

hived/condenser_api/lookup_account_names.py

hived/condenser_api/lookup_accounts.py

hived/condenser_api/lookup_witness_accounts.py

hived/condenser_api/verify_authority.py

hived/create_account_list.py

hived/database_api/CMakeLists.txt

hived/database_api/README.md

hived/database_api/find_account_recovery_requests.py

hived/database_api/find_accounts.py

hived/database_api/find_change_recovery_account_requests.py

hived/database_api/find_decline_voting_rights_requests.py

hived/database_api/find_escrows.py

hived/database_api/find_hbd_conversion_requests.py

hived/database_api/find_limit_orders.py

hived/database_api/find_owner_histories.py

hived/database_api/find_proposals.py

hived/database_api/find_savings_withdrawals.py

hived/database_api/find_smt_contributions.py