It is possible. For putting table vertically, you may just put a table above other, you may just remove the header of below table by using "showHeader"=>false.

To put table horizontally without space, there is much to do with your layout, you can do:

<div class="row">
    <div class="col-md-6" style="margin:0px;padding:0px">
        <!-- Put table 1 here -->
    </div>
    <div class="col-md-6"  style="margin:0px;padding:0px">
        <!-- Put table 2 here -->
    </div>
</div>