Sometimes, code lenses for Run/Debug links on main methods don't show up immediately #631

Environment

• Operating System: Win/Mac/Linux
• JDK version:1.8/11/12
• Visual Studio Code version:1.37.0
• Java extension version: 0.47.0
• Java Debugger extension version:0.20.0

Steps To Reproduce

1. Git clone https://github.com/spring-projects/spring-petclinic.git.
2. Open project in VScode.
3. Open PetClinicApplication.java.

Current Result

Sometimes, after project initialized, Run/Debug code lenses don't show up immediately until you edit java file or switch to another java file and switch back.

Expected Result

Run/Debug code lenses should show up immediately