merged functions, removed superfluous ones

[daniel-jettka]

Description, Context and related Issue

This merges some functions which basically do the same thing... get a localized string for the text value of an element.
So these functions were merged into eutil:getLocalizedName($node, $lang) by expanding it a bit:

• annotation:getLocalizedLabel($node)
• annotation:generateTitle($anno as element(), $lang as xs:string)
• annotation:getTitle($anno as element(), $lang as xs:string)
• annotation:category_getName($category as element(), $language as xs:string)

closes #19

How Has This Been Tested?

Looked for annotations and see if they are rendered correctly.

Types of changes

• Improvement
• Refactoring

Overview

• I have updated the inline documentation accordingly.
• I have performed a self-review of my code, according to the style guide
• I have read the CONTRIBUTING document.

[peterstadler]

I totally agree with the refactoring but would only add that having some tests here (for eutil:getLocalizedName) would really be beneficial!

[daniel-jettka]

I totally agree with the refactoring but would only add that having some tests here (for eutil:getLocalizedName) would really be beneficial!

Yes, that is true! I added tests for eutil:getLocalizedName and committed to this PR.

[bwbohl]

This will definitely interfere with #83 because I also changed some of these functions