Moving expiration token contstant, to workaround build issues on release
 Fixed unit test to use the newXMLGregarianCalendar constructor
Merge pull request #587 from kushala2012/checkmateDateHeader

checkmate Date Header - additional changes to handle deprecated newXMLGregarionCalendar empty construct in new java versions
B-48953 bugfix in api validator multi match mode
Merge pull request #588 from CoderLisa/B-48953_bugfix

B-48953 bugfix in api validator multi match mode
[maven-release-plugin] prepare release papi-2.8.1
[maven-release-plugin] prepare for next development iteration