Add policy to allow maintainers to create subgroups when enabled
Add policy to allow maintainers to create subgroups when enabled

mmkassem/gitlabhq,stoplightio/gitlabhq,stoplightio/gitlabhq,stoplightio/gitlabhq,stoplightio/gitlabhq,mmkassem/gitlabhq,mmkassem/gitlabhq,mmkassem/gitlabhq