#172 Webapp: add fields supremeChamber and supremeChamberDivision to search form

J) it's matter of taste, but probably more readable would be use code:
```
		try {
			int intChamberId = Integer.parseInt(supremeChamberId);
			return simpleDivisionConverter.convertScChamberDivisions(scChamberDivisionRepository.findAllByScChamberId(intChamberId));
		} catch (NumberFormatException e) {
			return Lists.newArrayList();
		} 
```