Unique CXF version set to 2.7.4 in root pom and features.

Changes all cxf versions to 2.7.4

${cxf.version} defined to 2.7.4 (was 2.4.3-fuse-01-02)

The change affects from wsdl/wadl code generation plugins used in quantum and bod.autobahn extensions:

quantum:
groupId:org.apache.cxf
artifactId:cxf-wadl2java-plugin
version:${cxf.version}

bod.autobahn:
groupId:org.apache.cxf</groupId>
artifactId:cxf-codegen-plugin</artifactId>
version:${cxf.version}</version>

It should be tested that these extensions are completely functional.