Add holdings creation test
Create load_in_frame method for KRAD pages

- KRAD base page has :load_in_frame, aliased to :load_in_iframe.
- Base page no longer has :fancybox as an element.
- :load_in_frame interrupts TF Gem's method_missing definition and
    calls the browser to catch elements inside the fancybox iframe
    without the necessity of altering the element definitions
    themselves; this method must be called for each on or visit block
    in which the page is loaded in a fancybox frame.