Fix typos
SelectTag correctly detects multiple="true" again

Issue: SPR-11678
XStreamMarshaller lazily creates fallback XppDriver

Issue: SPR-11635
AbstractMarshaller pre-implements getDefaultEncoding() method

Issue: SPR-11635
Polishing

Issue: SPR-11637
Dropped JCache RC repo (now unused); minor dependency upgrades

Issue: SPR-11640