[fix #572] fix bug that apiservice can't get result

[wayson20]

What is the purpose of the change

fix #572, that apiservice can't get result

Brief change log

update execute.js

Verifying this change

This change is a trivial rework / code cleanup without any test coverage.

Does this pull request potentially affect one of the following parts:

• Dependencies (does it add or upgrade a dependency): (no)
• Anything that affects deployment: (no)
• The Core framework, i.e., AppConn, Orchestrator, ApiService.: (no)

Documentation

• Does this pull request introduce a new feature? (no)
• If yes, how is the feature documented? (not documented)