RFR: 8221219: ZGC: Remove ZStallOnOutOfMemory option

[Per Liden]

Thanks Stefan!

/Per

On 3/21/19 9:40 AM, Stefan Karlsson wrote:
> Looks good.
> 
> StefanK
> 
> On 2019-03-21 09:12, Per Liden wrote:
>> The ZStallOnOutOfMemory option was added in ZGC's early days, and was 
>> at that time useful when testing and debugging. These days it's not so 
>> useful, and I can't really see anyone wanting to use it when running a 
>> real application as is can/will cause pre-mature OOMEs to be thrown. I 
>> suggest we remove it.
>>
>> Bug: https://bugs.openjdk.java.net/browse/JDK-8221219
>> Webrev: http://cr.openjdk.java.net/~pliden/8221219/webrev.0
>>
>> (Change builds on JDK-8221212, which is out for review)
>>
>> /Per