CountryServiceImplTest: use single quotes for strings.

Should be in ab95ef6 commit.

No functional changes.

Author: php-coder

src/test/groovy/ru/mystamps/web/service/CountryServiceImplTest.groovy

@@ -88,9 +88,9 @@ class CountryServiceImplTest extends Specification {
 		given:
 			Integer expectedId = 7
 		and:
-			form.setName("Example Country")
+			form.setName('Example Country')
 		and:
-			String expectedSlug = "example-country"
+			String expectedSlug = 'example-country'
 		and:
 			jdbcCountryDao.add(_ as AddCountryDbDto) >> expectedId
 		and: