Add RTL support to Scrollable DataTable

[mertsincan]

Exp;

<h3>Horizontal</h3>
<p:dataTable var="car" value="#{dtScrollView.cars2}" scrollable="true" scrollWidth="400" dir="rtl">
    <p:column headerText="Id" footerText="Id">
        <h:outputText value="#{car.id}" />
    </p:column>
    <p:column headerText="Year" footerText="Year">
        <h:outputText value="#{car.year}" />
    </p:column>
    <p:column headerText="Brand" footerText="Brand">
        <h:outputText value="#{car.brand}" />
    </p:column>
    <p:column headerText="Color" footerText="Color">
        <h:outputText value="#{car.color}" />
    </p:column>
</p:dataTable>