Fix Unicode support in members retrieval method
Fix Unicode support in members retrieval method

Change-Id: Ib9ad2350e49498fe42c2ab28e990af8bec238ebe

openstack/stackalytics,mohitsethi/stackalytics,mhharsh/stackalytics,dliu2015/stackalytics_zanata,mohitsethi/stackalytics,stackforge/stackalytics,0xf2/stackalytics,Solinea/stackalytics,Code-Fly/stackalytics,Solinea/stackalytics,Code-Fly/stackalytics,AlexanderYAPPO/stackalytics,openstack/stackalytics,nihilifer/stackalytics,openstack/stackalytics,Mirantis/stackalytics,dliu2015/stackalytics_zanata,danielmellado/stackalytics,nihilifer/stackalytics,mhharsh/stackalytics,stackforge/stackalytics,mhharsh/stackalytics,stackforge/stackalytics,dliu2015/stackalytics_zanata,Code-Fly/stackalytics,Mirantis/stackalytics,openstack/stackalytics,0xf2/stackalytics,AlexanderYAPPO/stackalytics,0xf2/stackalytics,AlexanderYAPPO/stackalytics,Solinea/stackalytics,mohitsethi/stackalytics,nihilifer/stackalytics,0xf2/stackalytics,Mirantis/stackalytics,danielmellado/stackalytics,danielmellado/stackalytics