Group Permission are not carrying down to Projects

Summary

Group members do not have access to the projects in the group.

Steps to reproduce

1. Create a group
2. Define members
3. Create a project

• you can see the member from the group listed under project members

1. Attempt to access the project as one of the other members - 404 error

Expected behavior

Members defined at the group level should flow down to projects unless explicitly altered at the project level

Actual behavior

I am forced to re-add all members directly to the project

Relevant logs and/or screenshots

Output of checks

Results of GitLab application Check

Results of GitLab environment info

System information
System:		Ubuntu 14.04
Current User:  	git
Using RVM:     	no
Ruby Version:  	2.3.3p222
Gem Version:   	2.6.6
Bundler Version:1.13.7
Rake Version:  	10.5.0
Sidekiq Version:4.2.7

GitLab information
Version:       	8.15.4-ee
Revision:      	e33b0cb
Directory:     	/opt/gitlab/embedded/service/gitlab-rails
DB Adapter:    	PostgreSQL
DB Version:    	9.2.18
URL:   		https://git.ibaset.com
HTTP Clone URL:	https://git.ibaset.com/some-group/some-project.git
SSH Clone URL: 	git@git.ibaset.com:some-group/some-project.git
Elasticsearch: 	no
Geo:   		no
Using LDAP:    	yes
Using Omniauth:	no

GitLab Shell
Version:       	4.1.1
Repository storage paths:
- default:     	/data00/gitlab/git-data/repositories
Hooks: 		/opt/gitlab/embedded/service/gitlab-shell/hooks/
Git:   		/opt/gitlab/embedded/bin/git

Possible fixes