wallet_bridge_api tests, part 2

This is a merge request with the next part of the wallet bridge api tests. Part one:!368 (merged)

requires for work: test-tools!46 (merged)

Tested scenarios:

1. Run method with correct arguments
2. Run method with incorrect arguments(e.g. with block number out of range)
3. Run method with the incorrect type of arguments
4. Run method with additional argument
5. Run method with a missing argument

Tested methods:

  1 wallet_bridge_api.broadcast_transaction
  2 wallet_bridge_api.broadcast_transaction_synchronous
  3 wallet_bridge_api.find_proposals
  4 wallet_bridge_api.find_rc_accounts
  5 wallet_bridge_api.find_recurrent_transfers
  6 wallet_bridge_api.get_account_history
  7 wallet_bridge_api.get_account
  8 wallet_bridge_api.get_accounts
  9 wallet_bridge_api.get_active_witnesses
 10 wallet_bridge_api.get_block
 11 wallet_bridge_api.get_chain_properties
 12 wallet_bridge_api.get_collateralized_conversion_requests
 13 wallet_bridge_api.get_conversion_requests
 14 wallet_bridge_api.get_current_median_history_price
 15 wallet_bridge_api.get_dynamic_global_properties
 16 wallet_bridge_api.get_feed_history
 17 wallet_bridge_api.get_hardfork_version
 18 wallet_bridge_api.get_open_orders
 19 wallet_bridge_api.get_ops_in_block
 20 wallet_bridge_api.get_order_book
 21 wallet_bridge_api.get_owner_history
 22 wallet_bridge_api.get_reward_fund
 23 wallet_bridge_api.get_transaction
 24 wallet_bridge_api.get_version
 25 wallet_bridge_api.get_withdraw_routes
 26 wallet_bridge_api.get_witness
 27 wallet_bridge_api.get_witness_schedule
 28 wallet_bridge_api.is_known_transaction
 29 wallet_bridge_api.list_accounts
 30 wallet_bridge_api.list_my_accounts
 31 wallet_bridge_api.list_proposals
 32 wallet_bridge_api.list_proposal_votes
 33 wallet_bridge_api.list_rc_accounts
 34 wallet_bridge_api.list_rc_direct_delegations
 35 wallet_bridge_api.list_witnesses