Wrong check if logger is enabled in WebServiceTemplate.logResponse method.
Merge pull request #9 from apechinsky/wrongLoggerCheck

Wrong check if logger is enabled in WebServiceTemplate.logResponse method.
Return null URI for null Destination

JmsTransportUtils.toUri now returns null for null destination
parameters.

Issue: SWS-848
Resolved NullPointerException

When the payload is null, the PayloadRootSmartSoapEndpointInterceptor
does not throw an exception anymore.

Issue: SWS-857
AxiomUtils.toEnveloper now using StAXUtils

Previously, AxiomUtils.toEnvelope() constructed its own XMLInputFactory
for creating a XMLStreamReader. Now we use Axiom's StAXUtils instead,
thus allowing users to use the standard Axiom mechanisms for setting
STAX properties etc.

Issue: SWS-851