[rql2sql] Boolean values should be substitued like others. Closes #2829481
Furthermore lgdb 1.10 deprecate boolean_value method and this simplify
testing.
[system]
db-driver = postgres
db-host = localhost
db-port = 5433
adapter = native
db-name = cw_fti_test
db-encoding = UTF-8
db-user = syt
db-password = syt
[admin]
login = admin
password = gingkow