RFR 9: 8048124 Read hijrah-config-umalqura.properties as a resource

Please review for JDK 9 only. To aid the modularization effort, the configuration of the Hijrah calendar should move the Hijrah calendar data to a resource. At this point, it does not look like there will be other Hijrah calendar variants; the function of calendar.properties to configure variants is unnecessary and is proposed to be removed. Since the other uses of calendars.properties have been eliminated the calendars.properties is removed. Webrev: http://cr.openjdk.java.net/~rriggs/webrev-hijrah-config-8049376/ Issue: https://bugs.openjdk.java.net/browse/JDK-8048124 Thanks, Roger