Warm Reboot should call the host reboot object

From https://github.com/openbmc/docs/blob/master/host-management.md:
To reboot the host:

curl -c cjar -b cjar -k -H "Content-Type: application/json" -X PUT
-d '{"data": "xyz.openbmc_project.State.Host.Transition.Reboot"}'
https://${bmc}/xyz/openbmc_project/state/host0/attr/RequestedHostTransition

Resolves openbmc/openbmc#2797

Tested: Pointed the local GUI to a Witherspoon system and
verfied the correct rest call was made and the system warm rebooted.
Change-Id: If073ef4447b323777603e886668212bd04791eea
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/app/common/services/api-utils.js b/app/common/services/api-utils.js
index 730b2d8..3f28751 100644
--- a/app/common/services/api-utils.js
+++ b/app/common/services/api-utils.js
@@ -357,19 +357,19 @@
               },
               hostReboot: function(callback){
                 $http({
-                  method: 'POST',
-                  url: DataService.getHost() + "/xyz/openbmc_project/state/host0",
+                  method: 'PUT',
+                  url: DataService.getHost() + "/xyz/openbmc_project/state/host0/attr/RequestedHostTransition",
                   headers: {
                       'Accept': 'application/json',
                       'Content-Type': 'application/json'
                   },
                   withCredentials: true,
-                  data: JSON.stringify({"data": []}),
+                  data: JSON.stringify({"data": "xyz.openbmc_project.State.Host.Transition.Reboot"})
                 }).then(function(response){
                       var json = JSON.stringify(response.data);
                       var content = JSON.parse(json);
                       if(callback){
-                          return callback(content);
+                          return callback(content.status);
                       }
                 }, function(error){
                   if(callback){
diff --git a/app/server-control/controllers/power-operations-controller.js b/app/server-control/controllers/power-operations-controller.js
index d38076f..273bb19 100644
--- a/app/server-control/controllers/power-operations-controller.js
+++ b/app/server-control/controllers/power-operations-controller.js
@@ -59,15 +59,11 @@
                 $scope.warmReboot = function(){
                     //@TODO:show progress
                     dataService.setBootingState();
-                    APIUtils.hostPowerOff(function(response){
+                    APIUtils.hostReboot(function(response){
                         if(response){
-                            APIUtils.hostPowerOn(function(response){
-                                if(response){
-                                    dataService.setPowerOnState();
-                                }else{
-                                    //@TODO:show error message
-                                }
-                            });
+                            dataService.setPowerOnState();
+                        }else{
+                            //@TODO:hide progress & show error message
                         }
                     });
                 };