Issue 50387 - enable_tls() should label ports with ldap_port_t
    
    Bug Description:
    In some tests we use enable_tls(), but the secure port doesn't get
    labeled automatically with ldap_port_t.
    
    Fix Description:
    Fix enable_tls() to label secure port.
    Additionally fix typo in pluginpath_validation_test.py
    
    Fixes https://pagure.io/389-ds-base/issue/50387
    
    Reviewed by: mreynolds, mhonek (Thanks!)