#68 Clean vote and citizen Entity

remove last warnings

src/test/kotlin/functional/ViewTest.kt

@@ -8,6 +8,7 @@ import fr.dcproject.component.citizen.CitizenRef
 import io.ktor.locations.KtorExperimentalLocationsAPI
 import io.ktor.server.testing.withTestApplication
 import io.ktor.util.KtorExperimentalAPI
+import kotlinx.coroutines.ExperimentalCoroutinesApi
 import org.amshove.kluent.`should be equal to`
 import org.junit.jupiter.api.Tag
 import org.junit.jupiter.api.Tags
@@ -19,6 +20,7 @@ import java.util.UUID
 
 @KtorExperimentalLocationsAPI
 @KtorExperimentalAPI
+@ExperimentalCoroutinesApi
 @TestInstance(PER_CLASS)
 @Tags(Tag("functional"))
 class ViewTest {