Request for Review (xs) - 8024945: Remove check on minimum size of MetaspaceSiz

[Kim Barrett]

> On Jun 13, 2016, at 5:56 PM, Jon Masamitsu <jon.masamitsu at oracle.com> wrote:
> 
> https://bugs.openjdk.java.net/browse/JDK-8024945
> 
> Previous to this change the smallest MetaspaceSize value allowed
> was 256k.  There is not reason for the restriction so this change
> removes it.  A very small MetaspaceSize  (even 0) does not cause
> a problem because during initialization a GC is not triggered unless
> the Metaspace needed grows beyond MaxMetaspaceSize.
> 
> http://cr.openjdk.java.net/~jmasa/8024945/webrev.00/
> 
> Tested with -XX:MetaspaceSize=0.  General testing with gc_test_suite.

Looks good.

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test/gc/metaspace/TestMetaspaceInitialization.java
27  * @bug 8042933

Should this be updated to also mention 8024945?

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