HBASE-16904 ADDENDUM cleanup of snapshot related changes for fs redo.

* missing header on SnapshotRestoreMetaChanges
* neuter parts of ScanPerformanceEvaluation that need to be updated
* fixup test class packages on Test*RestoreSnapshotHelper
* fixup test class packages on TestMob*ExportSnapshot
* fixup new javadoc warnings
* fixup new findbugs warning
* favor commenting out and placeholders that result in test failures over failures for test-compile

Signed-off-by: Umesh Agashe <uagashe@cloudera.com>
17 files changed