[8u-dev] RFA: JDK-8146115: Improve docker container detection and resource configuration usage

[Poonam Parhar]

Hello,

Please approve the backport of the following enhancement to 8u-dev:

Enhancement: JDK-8146115 
<https://bugs.openjdk.java.net/browse/JDK-8146115>: Improve docker 
container detection and resource configuration usage
Webrev: http://cr.openjdk.java.net/~poonam/8146115/webrev.02/
Review Thread: 
http://mail.openjdk.java.net/pipermail/hotspot-dev/2018-May/032261.html

The changes also include the fixes for the following two bugs:
Bug JDK-8186248 <https://bugs.openjdk.java.net/browse/JDK-8186248>: 
Allow more flexibility in selecting Heap % of available RAM
Bug JDK-8190283 <https://bugs.openjdk.java.net/browse/JDK-8190283>: 
Default heap sizing options select a MaxHeapSize larger than available 
physical memory in some cases


Thanks,
Poonam