Some unit tests fail with JDK17

[geofjamg]

• Do you want to request a feature or report a bug?
  Bug

• What is the current behavior?
  Unit tests relying on SVG comparison fail when running with Java17.
  A bit of history:

• before migrating to JDK11, SVG produced (so by JDK8) for CDATA section was:

<svg xmlns="http://www.w3.org/2000/svg">
   <style><![CDATA[
XXXX
]]></style>

• with JDK11 we got:

<svg xmlns="http://www.w3.org/2000/svg">
    <style>
        <![CDATA[
]]>
    </style>

So additional line breaks are added after and before open and close style tag.

• we migrated all reference files to new format to make test passing again.
• this was a bug and it seems to have been fixed in JDK14 according to this thread https://stackoverflow.com/questions/55853220/handling-change-in-newlines-by-xml-transformation-for-cdata-from-java-8-to-java
• so using JDK17 we need to go back to original formatting...

• What is the expected behavior?
  we want unit test succeed using JDK11 and JDK17

• What is the motivation / use case for changing the behavior?

• Please tell us about your environment:

  • PowSyBl Version: ...
  • OS Version: ...

• Other information (e.g. detailed explanation, stacktraces, related issues, suggestions how to fix, links for us to have context, eg. stackoverflow, spectrum, etc)

(if a question doesn't apply, you can delete it)

[geofjamg]

@flo-dup I propose like explain in the thread to got back to JDK8 formatting and add to regex replace hack to remove extra line breaks added by JDK11.