config.h: create function for init/reload cgconfig template cache

config.h: create function for init/reload cgconfig template cache

    Two new functions maintain the templates cache:
    int cgroup_init_templates_cache(char *pathname);
    int cgroup_reload_cached_templates(char *pathname);

    their are analogous to cgroup_init_rules_cache and cgroup_reload_cached_rules
    the only difference is there can be set configuration file as a parameter

    Changelog: remove useless comments

    Signed-off-by: Ivana Hutarova Varekova <varekova@redhat.com>
    Acked-By: Jan Safranek <jsafrane@redhat.com>