add more test before to commit/checkout compressed histogram data in Face database, to prevent crashes, especially if data are corrupted from database.
CCBUGS: 335624
CCBUGS: 330342
CCBUGS: 329873
CCBUGS: 326742
CCBUGS: 326586
CCBUGS: 326585
CCBUGS: 324774
CCBUGS: 323888
CCBUGS: 320812
CCBUGS: 312440
CCBUGS: 309027
CCBUGS: 308645
CCBUGS: 301611
CCBUGS: 297558
CCBUGS: 285517