Removed unneeded escape_dictionary().  Replaced escape_string().
Removed unneeded escape_dictionary().  Replaced escape_string().

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