Fixed syntax error in yaml test def

Fixed:

yaml.scanner.ScannerError: while scanning a simple key
  in "tests/tests_api/hivemind/tavern_full_sync/bridge_api_patterns/get_account_posts/replies/jeffjagoe.tavern.yaml", line 7, column 3
could not find expected ':'
  in "tests/tests_api/hivemind/tavern_full_sync/bridge_api_patterns/get_account_posts/replies/jeffjagoe.tavern.yaml", line 10, column 3