WebAccess: new robot external login method
WebAccess: new robot external login method

* Added support for robot authentication.

* Dropped support for Apache like user/group authentication.

* HTTPS is now required in WebAccess admin interface.

* Added new CFG_OPENAIRE_SITE flag in invenio.conf.

inveniosoftware/invenio-search,inveniosoftware/invenio-search,tiborsimko/invenio-search,tiborsimko/invenio-search,tiborsimko/invenio-records,inveniosoftware/invenio-records,inveniosoftware/invenio-records,tiborsimko/invenio-records