fix a bug in tests (#1458)

* is_db_sqlite is not accessible

Co-authored-by: sabban <15465465+sabban@users.noreply.github.com>

tests/lib/config/config-global

@@ -53,7 +53,8 @@ make_init_data() {
 
     # when installed pacakges are always using sqlite, so no need to regenerate
     # local credz for sqlite
-    is_db_sqlite || ${CSCLI} machines add --auto
+   
+    [ "${DB_BACKEND}" == "sqlite" ] || ${CSCLI} machines add --auto
 
     "${TEST_DIR}/instance-crowdsec" start
     "${CSCLI}" lapi status