Fix activate image and reboot BMC

- Change bmcReboot callback in apiutils.js to HTTP request that returns a promise that is resolved with response object
- Remove emitted 'user-logged-in' as it is not needed to reboot BMC on firmware controller and bmc reboot controller
- Add toast message for visual confirmation of successful BMC reboot

Tested: On Server Configuration > Firmware page uploaded new image to activate and automatically reboot. After 2-3 minutes confirmed image activated and then BMC rebooted after image activation. Tested Server Control > Reboot BMC page by selecting Reboot BMC, confirmed BMC rebooted.

Resolves openbmc/phosphor-webui#79

Signed-off-by: Dixsie Wolmers <dixsiew@gmail.com>
Change-Id: Ied6809ad1ed6cc3c73ac5c818c7a06607810c396
diff --git a/app/common/services/api-utils.js b/app/common/services/api-utils.js
index 211f6d7..e523993 100644
--- a/app/common/services/api-utils.js
+++ b/app/common/services/api-utils.js
@@ -710,30 +710,15 @@
             data: JSON.stringify({'data': state})
           })
         },
-        bmcReboot: function(callback) {
-          $http({
+        bmcReboot: function() {
+          return $http({
             method: 'PUT',
             url: DataService.getHost() +
                 '/xyz/openbmc_project/state/bmc0/attr/RequestedBMCTransition',
             withCredentials: true,
             data: JSON.stringify(
                 {'data': 'xyz.openbmc_project.State.BMC.Transition.Reboot'})
-          })
-              .then(
-                  function(response) {
-                    var json = JSON.stringify(response.data);
-                    var content = JSON.parse(json);
-                    if (callback) {
-                      return callback(content.status);
-                    }
-                  },
-                  function(error) {
-                    if (callback) {
-                      callback(error);
-                    } else {
-                      console.log(error);
-                    }
-                  });
+          });
         },
         getLastRebootTime: function() {
           return $http({