Update dbs3-client version

requirements.txt

@@ -18,7 +18,7 @@ CMSCouchapp~=1.3.4            # wmcore,wmagent
 CMSMonitoring~=0.6.10         # wmcore,wmagent,reqmgr2,reqmon,global-workqueue,reqmgr2ms-unmerged,reqmgr2ms-output,reqmgr2ms-pileup,reqmgr2ms-monitor,reqmgr2ms-transferor,reqmgr2ms-rulecleaner
 coverage~=5.4                 # wmcore,wmagent,wmagent-devtools
 cx-Oracle~=8.3.0              # wmcore,wmagent
-dbs3-client~=4.0.12           # wmcore,wmagent,reqmgr2,reqmon,global-workqueue
+dbs3-client~=4.0.19           # wmcore,wmagent,reqmgr2,reqmon,global-workqueue
 future~=0.18.2                # wmcore,wmagent,wmagent-devtools,reqmgr2,reqmon,acdcserver,global-workqueue,reqmgr2ms-unmerged,reqmgr2ms-output,reqmgr2ms-pileup,reqmgr2ms-monitor,reqmgr2ms-transferor,reqmgr2ms-rulecleaner
 gfal2-python~=1.11.0.post3    # wmcore,reqmgr2ms-unmerged
 httplib2~=0.20.4              # wmcore,wmagent,reqmgr2,reqmon,acdcserver,global-workqueue,reqmgr2ms-unmerged,reqmgr2ms-output,reqmgr2ms-pileup,reqmgr2ms-monitor,reqmgr2ms-transferor,reqmgr2ms-rulecleaner