Getting exception "Illegal character(s) in message header value" while using camel route

Issue

• I am migrating from fuse 6.1 to 6.3. When I am loading properties file in camel route header and calling the restful web service, I am ending with following exception

• Code

 exchange.getIn().setHeader("MESSAGES", new Properties().load(new FileInputStream("filepath.properties"));

• Exception

java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)[:1.8.0_111]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)[:1.8.0_111]
Caused by: java.lang.IllegalArgumentException: Illegal character(s) in message header value: {rol.ussd.msg.confirmoffence=1 Confirm
2 Another ticket}
    at sun.net.www.protocol.http.HttpURLConnection.checkMessageHeader(HttpURLConnection.java:541)[:1.8.0_111]
    at sun.net.www.protocol.http.HttpURLConnection.isExternalMessageHeaderAllowed(HttpURLConnection.java:492)[:1.8.0_111]
    at sun.net.www.protocol.http.HttpURLConnection.setRequestProperty(HttpURLConnection.java:3057)[:1.8.0_111]
    at org.apache.cxf.transport.http.Headers.transferProtocolHeadersToURLConnection(Headers.java:385)