Missing codeAction Tests in JakartaServletTest.java file

[Anusree Lakshmi]

While addressing issue #577, I discovered that there were no test cases for the CompleteFilterAnnotationQuickFix code action and one part of CompleteServletAnnotationQuickFix code action.
To rectify this, I have added tests for the same in lsp4ij component for intellij in the JakartaServletTest.java file.

You can find the changes in the JakartaServletTest.java file within the PR #639.
For your convenience, you can access the added tests in the JakartaServletTest.java file through this link: Tests.