RFR [8]: 2018-11-11, Bulk backports to sh/jdk8u

[Aleksey Shipilev]

http://cr.openjdk.java.net/~shade/shenandoah/backports/jdk8u-20181111/webrev.01/

Includes bugfixes and cleanups from last week:

 [backport] Remove old code from escape analysis
 [backport] Cleanup .ad files includes
 [backport] Make ResourceMark use consistent in ShenandoahCodeRoots
 [backport] Always copy forward for disjoint arrays (test)
 [backport] Fix build failures when Shenandoah is disabled, after #include reshuffles
 [backport] Rename BrooksPointer to ShenandoahBrooksPointer

Testing: x86_64 hotspot_tier3_gc_shenandoah {fastdebug|release}, aarch64 build

Thanks,
-Aleksey