Change text to edit hostname

Before this text was "edit server name". On the Network page we call
it "hostname" and the rest call is "Hostname". To be consistent
change to "edit hostname".

Change-Id: I0042f56cc77180dbb0cc51f7e955762f1eeafb4d
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/app/overview/controllers/system-overview-controller.js b/app/overview/controllers/system-overview-controller.js
index 2f37c01..45ac8ae 100644
--- a/app/overview/controllers/system-overview-controller.js
+++ b/app/overview/controllers/system-overview-controller.js
@@ -30,7 +30,7 @@
                 $scope.power_cap = "";
                 $scope.bmc_ip_addresses = [];
                 $scope.loading = false;
-                $scope.edit_server_name = false;
+                $scope.edit_hostname = false;
 
                 loadOverviewData();
                 function loadOverviewData(){
@@ -128,7 +128,7 @@
                 }
 
                 $scope.saveHostname = function(hostname) {
-                    $scope.edit_server_name = false;
+                    $scope.edit_hostname = false;
                     $scope.loading = true;
                     APIUtils.setHostname(hostname).then(function(data){
                         APIUtils.getNetworkInfo().then(function(data){