[facets] should remove groupby from base rqlst. Closes #1796196 as we search for values for a variable, there seems to be no case where we would be interested in groups, though there are clearly some were leaving groups cause errors.

\.svn
^build$
^dist$
\.pyc$
\.pyo$
\.bak$
\.old$
\~$
\#.*?\#$
\.swp$
^doc/book/en/apidoc$
\.old$
syntax: regexp
.*/data/database/.*\.sqlite
.*/data/database/.*\.config
.*/data/database/tmpdb.*