Continued with project:

Continued with project:
- rewrote iteration over Contact fields  with an iterator from Map.Entry
- added default values in orderjsp (to output session-stored values)
- introduced getPrintableValueFromSession() which returns a value from session key or an empty string for null
- introduced getValueFromSession() which is a low-level method to get a value from session key (but sychronized)
Signed-off-by:Roland Häder <roland@mxchange.org>