apply the validatePropertyNames option for messages to be sent in addition to those received

The JIRA QPIDJMS-48 added a new connection option jms.validatePropertyNames which can be used to override the validation of property names against the JMS spec. Switching off the validation allows for example to read message properties which contain period in their names.

Right now this option seems to be taken into account only for received messages. It would be great if the the option is taken into account also for messages which are created and sent by the client. That would allow to send messages containing period in property names.