{Category,Country}ServiceImpl: properly handle special characters

[php-coder]

We should resolve the following TODOs:

mystamps/src/main/java/ru/mystamps/web/service/CategoryServiceImpl.java

Lines 100 to 110 in 29f6dc9

	public List<Integer> findIdsWhenNameStartsWith(String name) {
	Validate.isTrue(StringUtils.isNotBlank(name), "Name must be non-blank");
	// TODO: escape % and _ chars in name
	Validate.isTrue(
	!StringUtils.containsAny(name, '%', '_'),
	"Name must not contain '%' or '_' chars"
	);
	return categoryDao.findIdsByNamePattern(name + '%');
	}

and

mystamps/src/main/java/ru/mystamps/web/service/CountryServiceImpl.java

Lines 97 to 107 in 29f6dc9

	public List<Integer> findIdsWhenNameStartsWith(String name) {
	Validate.isTrue(StringUtils.isNotBlank(name), "Name must be non-blank");
	// TODO: escape % and _ chars in name
	Validate.isTrue(
	!StringUtils.containsAny(name, '%', '_'),
	"Name must not contain '%' or '_' chars"
	);
	return countryDao.findIdsByNamePattern(name + '%');
	}

Tech debt for 29f6dc9 (#660)