[TS-SELENIUM] Cover the "Use Java IDE features and the inner loop" step from "Happy path" scenario

[Ohrimenko1988]

We have an epic issue where described test scenarios for Che 7 #12728 .

4 - Use Java IDE features and the inner loop

Steps

• 1 - Open a Java file, change some code and verify that error highlighting, code completion and code navigation work
• 2 - Use the "Build" task and verify that the application is build successfully
• 3 - Use the "Run" task and and verify that the application is updated successfully
• 4 - Set a breakpoint and use the "Debug" task to verify that the application stops at the breakpoint

Success criteria

• Java Code completion, error highlighting and code navigation should work successfully
• The provided "Build" task executes successfully
• The provided "Run" task executes successfully and a pop-up ask to open the application URL
• Changes done at step 4.1 should be applied
• Java Debugger should be able to attach successfully when executing the "Debug" task.
• Java Debugger should be stop at a breakpoint and resume application execution when clicking on resume.

We should cover this steps by automated test.

[Ohrimenko1988]

Done #13615