RFR: [8u] JDK-8225121 Set JDK_UPDATE_VERSION, JDK_BUILD_NUMBER and MILESTONE to correct values by default

[Andrew John Hughes]

Webrev: https://cr.openjdk.java.net/~andrew/openjdk8/8225121/webrev.01/
Bug: https://bugs.openjdk.java.net/browse/JDK-8225121

The intention of this simple patch is to provide better defaults for the
version output for 8u, which should hopefully make issues with unclear
'ea' builds less frequent.

The default version output post patch is:

$ /mnt/builder/8u-dev/images/j2sdk-image/bin/java -version
openjdk version "1.8.0_222-ea"
OpenJDK Runtime Environment (build 1.8.0_222-ea-b06)
OpenJDK 64-Bit Server VM (build 25.222-b06, mixed mode)

My intention is to reuse this bug ID once approved to update these
values as part of the regular tagging process. 8u allows changesets to
use the same bug ID and I think that's better than having new bugs every
week! It also automatically collates all such changes in the bug database.

Going forward, the process will be:

* Weekly tag: Update JDK_BUILD_NUMBER to new value
* Branch for next release: JDK_UPDATE_VERSION updated and
JDK_BUILD_NUMBER reset to b01 in 8u-dev only
* Release: Update MILESTONE to "fcs" to produce release builds.

Does this sound ok?

Thanks,
-- 
Andrew :)

Senior Free Java Software Engineer
Red Hat, Inc. (http://www.redhat.com)

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