Fix typo in gridfs store
Fix typo in gridfs store

Closes-Bug: #1266986

Change-Id: Ic69ef987b785d0db25e2fea2a745f3d00780241a

jumpstarter-io/glance,sigmavirus24/glance,scripnichenko/glance,openstack/glance,dims/glance,openstack/glance,jumpstarter-io/glance,klmitch/glance,darren-wang/gl,redhat-openstack/glance,takeshineshiro/glance,saeki-masaki/glance,dims/glance,klmitch/glance,JioCloud/glance,akash1808/glance,scripnichenko/glance,ozamiatin/glance,JioCloud/glance,wkoathp/glance,saeki-masaki/glance,stevelle/glance,tanglei528/glance,sigmavirus24/glance,rajalokan/glance,kfwang/Glance-OVA-OVF,kfwang/Glance-OVA-OVF,paramite/glance,akash1808/glance,tanglei528/glance,redhat-openstack/glance,stevelle/glance,takeshineshiro/glance,wkoathp/glance,paramite/glance,vuntz/glance,ozamiatin/glance,openstack/glance,rajalokan/glance,vuntz/glance,darren-wang/gl