Supplement the account_history_by_condenser_test according to requests

Following requests remained to implement #428 (closed):

• A strict comparison of returned operations to check that legacy form (returned by condenser_api) is valid and adequate to operation originally retrieved from AH call. It's been implemented by using json::to_text to compare whole operations in depth regardless their type.
• All regular (non-virtual) operations are checked by condenser_api calls.
• All virtual operations should be checked by condenser_api calls.
• The calls to get_ops_in_block have been supplemented by invalid ones (too few / too many arguments).
• get_account_history should be covered as remaining AH related call provided by condenser_api