Implement fix for https://bugzilla.redhat.com/show_bug.cgi?id=1017997

i) refresh remaining hours in document list on the editor
ii) fix project statistic (remaining hours) calculation, depending on common-api 3.1.1-SNAPSHOT
Merge pull request #225 from zanata/rhbz1017997

Implement fix for https://bugzilla.redhat.com/show_bug.cgi?id=1017997