[test/querier] use the new connection api (part 2/3)
A couple of tests need a schema constraint to be dropped to pass with
`.qexecute`.
\.svn
^build$
^dist$
\.pyc$
\.pyo$
\.bak$
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\~$
\#.*?\#$
\.swp$
^doc/book/en/apidoc$
\.old$
syntax: regexp
.*/data/database/.*\.sqlite
.*/data/database/.*\.config
.*/data/database/tmpdb.*
.*/data/ldapdb/.*
^doc/html/
^doc/doctrees/
^doc/book/en/devweb/js_api/
data/pgdb/