Fix slaptest in test077
The libtool wrapper scripts lose argv when exec'ing the real binary. In the CI Docker container, where the build runs as root, this was actually starting a real slapd on the default port. Outside Docker, running as a non-root user, this slapd would just fail to start, and wouldn't convert the config either. Using "slapd -Tt" fixes the issue but also prints a warning from slaptest since the database hasn't been initialized yet. Dynamic config isn't actually used in this test script, so let's just run slapd off the config file directly.