CAMEL-5771 IOHelper.getCharsetName() should lookup CHARSET_NAME in headers if exchange property is not set
CAMEL-5771 IOHelper.getCharsetName() should lookup CHARSET_NAME in headers if exchange property is not set

Conflicts:
	camel-core/src/test/java/org/apache/camel/util/IOHelperTest.java
CAMEL-6796: camel-xmlsecurity - Some options is not exposed as getter/setters
Upgrade to CXF 2.7.7