added getCurrentHourUTC again (#187)

Corona-Warn-App/src/main/java/de/rki/coronawarnapp/util/TimeAndDateExtensions.kt

@@ -2,6 +2,7 @@ package de.rki.coronawarnapp.util
 
 import org.joda.time.DateTime
 import org.joda.time.DateTimeZone
+import org.joda.time.Instant
 import org.joda.time.chrono.GJChronology
 import org.joda.time.format.DateTimeFormat
 import java.util.Date
@@ -13,6 +14,8 @@ object TimeAndDateExtensions {
     private const val MS_TO_HOURS = (1000 * 60 * 60)
     private const val MS_TO_SECONDS = 1000
 
+    fun getCurrentHourUTC(): Int = DateTime(Instant.now(), DateTimeZone.UTC).hourOfDay().get()
+
     fun Date.toServerFormat(): String =
         DateTimeFormat.forPattern("yyyy-MM-dd").withChronology(GJChronology.getInstance())
             .withZoneUTC()