[REGRESSION] camel-xstream not working on Java 1.7

features:install camel-xstream
ERROR: Bundle org.apache.servicemix.bundles.xstream [225] Error starting/stopping bundle. (org.osgi.framework.BundleException: Unresolved constraint in bundle org.apache.servicemix.bundles.xstream [225]: Unable to resolve 225.0: missing requirement [225.0] osgi.ee; (&(osgi.ee=JavaSE)(version=1.8)))
org.osgi.framework.BundleException: Unresolved constraint in bundle org.apache.servicemix.bundles.xstream [225]: Unable to resolve 225.0: missing requirement [225.0] osgi.ee; (&(osgi.ee=JavaSE)(version=1.8))
	at org.apache.felix.framework.Felix.resolveBundleRevision(Felix.java:4002)
	at org.apache.felix.framework.Felix.startBundle(Felix.java:2045)
	at org.apache.felix.framework.Felix.setBundleStartLevel(Felix.java:1491)
	at org.apache.felix.framework.FrameworkStartLevelImpl.run(FrameworkStartLevelImpl.java:334)
	at java.lang.Thread.run(Thread.java:745)