installation: fix apache configuration
installation: fix apache configuration

* Creates create "run" directory in instance folder.

* Fixes wrong variable name causing demosite population to fail.

* Adds missing module qrcode to requirements.

* Fixes error output during demosite population.

Co-authored-by: Adrian-Tudor Panescu <adrian.tudor.panescu@cern.ch>

NOTE: beware, patch amended by Tibor to use new file names

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