Implements xml_form_builder_definition_alter to alter access permission ...

...to tab elements for zoomaps and murrayhill namespaces.  The elements only need to be set for the default index of the tab panel and once the form is rendered the access to other fields will be inherited to all tab panels.

Requires update to the islandora xml form builder module:  Pull request that adds the hook: https://github.com/Islandora/islandora_xml_forms/pull/159