LC link building related Blueprint classes changed

Livecontext link building changed on the java API level. Links are now generated by the newly introduced class com.coremedia.livecontext.fragment.links.CommerceLinks that was added to module lc-cae . The generated links remain as before.

(CMS-17316)

Commerce-Hub cache property keys have changed.

All keys of the Commerce-Hub cache properties maps are now validated to be lowercase.

(CMS-17224)