refactored test module names

src/db/_securities.rs

@@ -98,7 +98,7 @@ pub fn list_securities(conn: &Connection) -> Result<Vec<Security>> {
 
 
 #[cfg(test)]
-mod test {
+mod test_securities {
     use rusqlite::{Connection, params};
 
     use crate::db::_test_utils::*;