RFR 9: 8146773 java/lang/ref/CleanerTest.java CleanerTest.testRefSubtypes() fails

[Roger Riggs]

Please review a fix for two test issues.  When run with -Xcomp and other 
switches that change
GC behavior; the CleanerTest was not giving enough to time to see the 
result of cleaning.
Also, added an adjustment of the number of cycles by the timeoutFactor.

Webrev:
   http://cr.openjdk.java.net/~rriggs/webrev-cleanertest-8146773/

8146773: java/lang/ref/CleanerTest.java CleanerTest.testRefSubtypes() fails
8148352: CleanerTest fails: Cleanable should have been freed

Thanks, Roger