RFC/RFR: Pick up jdk-11.0.3+2 to sh/jdk11

[Aleksey Shipilev]

Another minor tag update from jdk-updates/jdk11u, now it is jdk-11.0.3+3. Merge is trivial.

Summary of changes:
 http://cr.openjdk.java.net/~shade/shenandoah/merges/jdk11-11.0.3%2b3/changesets.txt

Webrev:
 http://cr.openjdk.java.net/~shade/shenandoah/merges/jdk11-11.0.3%2b3/webrev/

As usual, the plan is to push this merge, run it through the nightlies and then tag it
shenandoah-jdk-11.0.3+3.

Testing: hotspot_gc_shenandoah {fastdebug,release}

-Aleksey