#237 CommonTS.getValueAsCalendar() sets incorrect timezone for positive offsets

[peterox]

For times with a positive offset the timezone is incorrect in the returned calendar

See attached unit test

CommonTM tm = new CommonTM("145624.090+1000");
assertEquals(TimeZone.getTimeZone("GMT+10"), tm.getValueAsCalendar().getTimeZone());

[Christian Ohr]

I think this is a duplicate of #229