copy the ansible role over so we can make minor adjustments (inserting our server-vars into the proper place at the right time)
simply role to move edxapp customizations into place
* point the edxapp role at the proper location for the customized requirements file
* insert the customization role just after edxapp runs to ensure that the required destinations exist when we move our stuff to them.
allow the isc_edx_ansible role to be responsible for putting the customized server vars in place