.....
            <aura:attribute name="userContact" type="Contact" />

            <aura:method name="callInit" action="{!c.init}" >
            <aura:registerEvent name="appEvent" type="c:ET_AppEvent_OverNightStay"/>
            <aura:handler name="init" value="{! this }" action="{! c.init }"/>

            <lightning:layout multipleRows="false" >
                <lightning:layoutItem size="10">
                    </lightning:layoutItem>
........