The loading state cannot be canceled when create a flavor with a existing name
Closes-Bug: #1990362
Change-Id: I409024fe9a47103e9e6401d408b739d0365bd621
1. Add client module to request openstack api
2. Remove window.request, stores use client to request api
3. Remove window.globals, use globalRootStore to deal with user info
Change-Id: I5657cfd8cf142dbacce8716991f805bbbb4a9222