Use correct border color between table rows

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

app/assets/stylesheets/framework/tables.scss

@@ -37,8 +37,8 @@ table {
       }
 
       td {
+        border-bottom: 1px solid;
         border-color: $table-border-color;
-        border-bottom: 1px solid $border-color;
       }
     }
   }

app/assets/stylesheets/framework/variables.scss

@@ -12,7 +12,7 @@ $gutter_inner_width: 258px;
  */
 $border-color:       #e5e5e5;
 $focus-border-color: #3aabf0;
-$table-border-color: #eef0f2;
+$table-border-color: #ececec;
 $background-color:   #fafafa;
 
 /*