WIP: fixing statistic problem
Fix issue with statistic not accurate in document list: https://bugzilla.redhat.com/show_bug.cgi?id=1024555
- detach project statistic from document statistic
- format hours(Math.ceil) for statistic
- format percentage(Math.floor) for statistic
Fix unit test
Fix checkstyle
Fix rest test
Fix compatibility test on VersionRawCompatibilityITCase
Fix wrong indent in file, extract statistic util to seperate class
Add comments on REST test case
Merge pull request #252 from zanata/rhbz1024555

Fix bug in https://bugzilla.redhat.com/show_bug.cgi?id=1024555