Update the affected system tests

SOAP-1845 ALL CAPS
Merge remote-tracking branch 'origin/next' into next
remove unused log
Read payload for REST mock request
Update release note
Update script dispatcher sample script
SOAP-2095 Finished most of the integration between native JSON support and SoapUI infrastructure
Allow label to figure out its own size
SOAP-2095 Introducing the DocumentContent in more places
SOAP-2095 Constant for mediaType. Method renaming. Refactoring.
SOAP-2095 Include full content as string/media type in the fired property
SOAP-2095 Remove the ContentChange event
SOAP-2095 Only convert to xml if not json
SOAP-2095 Extracted typed content interface for document content and http response based contents
SOAP-2095 Responsibility to convert to xml moved the document. View now requesting specific format.
SOAP-2095 Force rendering with new style
SOAP-2095 XML button in Overview tab working again
SOAP-2095 Syntax highlighting for REST Request Body Editor and HTTP Test Steps
SOAP-2095 Reword message about wrong format
SOAP-2095 Syntax highlighting for lots of cool content types