RFR: Young refproc test

[wadehenn]

Young refproc test

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Commit messages:
 - fix white space
 - remove duplicate young gen refproc test
 - Add young gen test to TestRefprocSanity.java

Changes: https://git.openjdk.java.net/shenandoah/pull/42/files
 Webrev: https://webrevs.openjdk.java.net/?repo=shenandoah&pr=42&range=00
  Stats: 13 lines in 1 file changed: 11 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/shenandoah/pull/42.diff
  Fetch: git fetch https://git.openjdk.java.net/shenandoah pull/42/head:pull/42

PR: https://git.openjdk.java.net/shenandoah/pull/42