Generate textchangetrackingtests.xml by xsl script

[kossebau]

• allows better maintainance of all duplicated content
• adds a test variant for changes in style:footer-left

Pretty complex xsl, any ideas how to cut that down? First approach with embedded logic failed due to xsl:call-template only taking hardcoded name attributes, nothing that can be evaluated.
So turned to more declarative description of test structure variants.

[vandenoever]

Could you explain a bit what you changed? The diff is not immediately clear and quite big due to code movements.

[kossebau]

Could you explain a bit what you changed? The diff is not immediately clear and quite big due to code movements.

Before textchangetrackingtests.xml was manually written, containing lots of duplicated stuff. The change is that textchangetrackingtests.xml is now generated from the new xsl script tests/createTextChangeTrackingTests.xsl.

The output of that script should be pretty the same, as before, besides indentation and the xml:id values used. And there are three new tests *_style_footer_left. Those are the third variant of the existing 3 types, adding to *_office_text and *_style_footer. Which makes 9 tests now. More to come (header ones :) ).