fixed return values from no-op methods in bcfg2_local.py
Cfg: added creator handler to perform one-time creation of static data
Cfg: Added feature to provide generation of SSH keys, authorized_keys file
Cfg: fixed existing Cfg bcfg2-lint plugin, added plugin to check for privkey.xml without pubkey.xml
schemas: fixed bound SELinux entries in bundler
StructFile: removed unnecessary exception handling in Index()
TemplateHelper: fixed bcfg2-lint plugin
bcfg2-lint: automatically load lint plugins that are part of enabled bcfg2 server plugins