Make Group#subgroup_creation_level return Owner if it is nil in DB
Make Group#subgroup_creation_level return Owner if it is nil in DB

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