base: new `demosite populate` force-recids option
base: new `demosite populate` force-recids option

* Adds new extra option `-e force-recids` to the `demosite populate`
  command.  Useful to load files with wanted pre-set record IDs.

Signed-off-by: Tibor Simko <c7116e45300b163846dc01f3ed02116e3f8ef7a5@cern.ch>

inveniosoftware/invenio-base,inveniosoftware/invenio-base,tiborsimko/invenio-base,tiborsimko/invenio-base