Add loading bar to Overview page

Signed-off-by: Yoshie Muranaka <yoshiemuranaka@gmail.com>
Change-Id: I47ef77dda6b348c854e875aa458acfa44e287c49
diff --git a/src/store/modules/Control/PowerControlStore.js b/src/store/modules/Control/PowerControlStore.js
index 63ede2d..7858539 100644
--- a/src/store/modules/Control/PowerControlStore.js
+++ b/src/store/modules/Control/PowerControlStore.js
@@ -17,8 +17,8 @@
       (state.powerConsumptionValue = powerConsumptionValue)
   },
   actions: {
-    getPowerControl({ commit }) {
-      api
+    async getPowerControl({ commit }) {
+      return await api
         .get('/redfish/v1/Chassis/chassis/Power')
         .then(response => {
           const powerControl = response.data.PowerControl;