RFR: Fix shared tests to run without Shenandoah

[Aleksey Shipilev]

On 11/28/18 6:24 PM, Roman Kennke wrote:
> Several shared tests wouldn't run or fail when Shenandoah is not
> available. This fixes them. Some needed an extra test section, some
> needed a runtime test, and one I did not know what to do:
> 
> test/hotspot/jtreg/gc/TestFullGCCount.java
> 
> http://cr.openjdk.java.net/~rkennke/fix-shared-tests/webrev.00/

*) TestSystemGC.java: @test should be TestSystemGCShenandoah

*) TestDynamicNumberOfGCThreads.java, TestInitialGCThreadLogging.java, TestGCId.java: bad indent
around L34, "sun" should be aligned?

  33  * @run driver ClassFileInstaller sun.hotspot.WhiteBox
  34  *                              sun.hotspot.WhiteBox$WhiteBoxPermission

*) TestDynamicNumberOfGCThreads.java, do you really need to change private->protected?

*) CriticalNativeStress.java: addition of "compact" + "-degen" does not make sense. Did you mean
"passive" + "+degen"? It probably makes sense to split out for a separate backport.

Thanks,
-Aleksey