make test vm use mysql db

mod-seafile-server.nix

@@ -74,7 +74,7 @@ in
           default = "localhost";
           description = "Database host.";
         };
-          dbport = mkOption {
+        port = mkOption {
           type = with types; nullOr (either int str);
           default = 3306;
           description = "Database port. Not required for sqlite.";

seafile-test.nix

@@ -26,6 +26,10 @@
     enable = true;
     #autorun = false;
     domainName = "seaf.local";
+    db = {
+      type = "mysql";
+      passwordFile = toString (pkgs.writeText "testPW" "lol");
+    };
   };
 
 }