6898160: Need serviceability support for new vm argument type 'uint64_t'
Summary: Add serviceability support for uint64_t. Flags of unknown type assert in debug builds and are ignored in product builds.
Reviewed-by: never, xlu, mchung, dcubed
6887571: Increase default heap config sizes
Summary: Apply modification of existing server heap size ergo to all collectors except CMS.
Reviewed-by: jmasa, ysr, xlu