Fix redundant namespace prefixes.
Fix mixed content for StAX.
 Merge branch 'namespaces_fix' into 'master'

Namespaces Fix

@miroslav.kos @marcel_valovy @martin_vojtek
Fix for https://bug.oraclecorp.com/pls/bug/webbug_print.show?c_rptno=18482850

Fixed redundant prefixes
Fixed whitespaces within mixed content for StAX parser
Fix copyright year