SOAP-2079 Setting credentials on endpoint doesn't work for REST endpoints
* Removed duplication check from BaseMockResult as that might block headers with multiple values.
* Instead, added an extra check where the duplicate Content-Encoding header was added.
SOAP-2015
Moved SoapUIActions and SoapUIFeatures enum constants to core, no free flowing texts anymore for action names: SOAP-2554
Merge branch 'next' of github.com:SmartBear/soapui into next
Merge branch 'next' of https://github.com/SmartBear/soapui into FIX_SOAP-2079
Fixed the action names: SOAP-2554
Merge remote-tracking branch 'origin/next' into next