AMBARI-3691 host detail page missing padding under tabs. (ababiichuk)

ambari-web/app/styles/application.less

@@ -3252,7 +3252,9 @@ ul.filter {
 #user-auth-method select {
   width: 320px;
 }
-
+.host-block {
+  margin-top: 20px;
+}
 /*start charts rack*/
 .rack {
   width: 98%;

ambari-web/app/templates/main/host/summary.hbs

@@ -16,7 +16,7 @@
 * limitations under the License.
 }}
 
-<div class="row-fluid">
+<div class="row-fluid host-block">
   <div class="span12">
     <div class="span6">
       {{!components}}