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

[roger riggs]

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