Send package. Package is sent to recipient defined in outgoingPackage. Method is asynchronous,
therefore not returning anything, but after package is sent, callback method will be called.
Every package is sent to recipient defined in it. If package sending gets exception, then send
document result with fault in it is created, sending will be continued anyway. Callback is
called for every package separately.
outgoingPackages - - package to send
ee.ria.dhx.exception.DhxException - - thrown if error occurs while sending document