Fix/hover copybook

[ap891843]

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

• Hover over implicit copybooks should not throw error. Also, wont show any hover content. But if the copybook is explicitly provided, show the hover
• Copybooks hover should work always ( currently if db2 implicit copybooks are added to a program, copybook hover doesn't work)

Checklist:

• Each of my commits contains one meaningful change
• I have performed rebase of my branch on top of the development
• I have performed a self-review of my own code
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I have checked my code and corrected any misspellings

[ap891843]

@mm-broadcom @ilidio-lopes

[ap891843]

small refactor

[Nurkambay]

@ap891843 I did not catch where is the actual fix. I see only the renaming of the method here