Add loading bar to Overview page

Signed-off-by: Yoshie Muranaka <yoshiemuranaka@gmail.com>
Change-Id: I47ef77dda6b348c854e875aa458acfa44e287c49
diff --git a/src/store/modules/Overview/OverviewStore.js b/src/store/modules/Overview/OverviewStore.js
index 30558d8..314728c 100644
--- a/src/store/modules/Overview/OverviewStore.js
+++ b/src/store/modules/Overview/OverviewStore.js
@@ -23,8 +23,8 @@
       (state.serverSerialNumber = serverSerialNumber)
   },
   actions: {
-    getServerInfo({ commit }) {
-      api
+    async getServerInfo({ commit }) {
+      return await api
         .get('/redfish/v1/Systems/system')
         .then(response => {
           const serverInfo = response.data;