Uninstall Instructions does not kill background processes.

BUILD: Tried this on gitlab_7.8.4-omnibus-1_amd64.deb (Ubuntu14.4) and gitlab-7.8.4_omnibus-1.el6.x86_64.rpm (Centos 6.6)

Repro:

Install omnibus package. (curl -O https://downloads-packages.s3.amazonaws.com/centos-6.6/gitlab-7.8.4_omnibus-1.el6.x86_64.rpm)
sudo rpm -i gitlab-7.8.4_omnibus-1.el6.x86_64.rpm
sudo gitlab-ctl reconfigure
Run uninstall steps. Observe the processes remain, as runit pidfile cannot be found and cannot attempt SIGKILL:

$ sudo gitlab-ctl uninstall  
ok: down: logrotate: 0s, normally up  
ok: down: nginx: 0s, normally up  
ok: down: postgresql: 0s, normally up  
ok: down: redis: 0s, normally up  
ok: down: sidekiq: 1s, normally up  
ok: down: unicorn: 0s, normally up  
could not find logrotate runit pidfile (service already stopped?), cannot attempt SIGKILL...  
ok: down: logrotate: 4s, normally up  
could not find nginx runit pidfile (service already stopped?), cannot attempt SIGKILL...  
ok: down: nginx: 4s, normally up  
could not find postgresql runit pidfile (service already stopped?), cannot attempt SIGKILL...  
ok: down: postgresql: 3s, normally up  
could not find redis runit pidfile (service already stopped?), cannot attempt SIGKILL...  
ok: down: redis: 3s, normally up  
could not find sidekiq runit pidfile (service already stopped?), cannot attempt SIGKILL...  
ok: down: sidekiq: 3s, normally up  
could not find unicorn runit pidfile (service already stopped?), cannot attempt SIGKILL...  
ok: down: unicorn: 1s, normally up  
Your config files have been backed up to /root/gitlab-cleanse-2015-03-12T11:43.  

$ ps aux | grep redis  
root     10969  0.0  0.0   4356   556 ?        S    11:43   0:00 svlogd -tt /var/log/gitlab/redis  
gitlab-+ 10974  0.0  0.3  39268  7732 ?        Ssl  11:43   0:00 /opt/gitlab/embedded/bin/redis-server 127.0.0.1:0                     
gitlab-+ 11032  0.0  0.3  39268  7724 ?        Ssl  11:43   0:00 /opt/gitlab/embedded/bin/redis-server 127.0.0.1:0                     
gitlab-+ 11093  0.0  0.3  39268  7724 ?        Ssl  11:43   0:00 /opt/gitlab/embedded/bin/redis-server 127.0.0.1:0                     
root     11114  0.0  0.0   4212   436 ?        Ss   11:43   0:00 runsv redis  
gitlab-+ 11131  0.0  0.3  39268  7732 ?        Ssl  11:43   0:00 /opt/gitlab/embedded/bin/redis-server 127.0.0.1:0                     
tony	 11434  0.0  0.0  15944   920 pts/6    S+   11:44   0:00 grep --color=auto redis  

$ sudo dpkg -r gitlab  
(Reading database ... 219154 files and directories currently installed.)  
Removing gitlab (7.8.4-omnibus-1) ...  
$ ps aux | grep redis  
root     10969  0.0  0.0   4356   556 ?        S    11:43   0:00 svlogd -tt /var/log/gitlab/redis  
gitlab-+ 10974  0.0  0.3  39268  7732 ?        Ssl  11:43   0:00 /opt/gitlab/embedded/bin/redis-server 127.0.0.1:0                     
gitlab-+ 11032  0.0  0.3  39268  7724 ?        Ssl  11:43   0:00 /opt/gitlab/embedded/bin/redis-server 127.0.0.1:0                     
gitlab-+ 11093  0.0  0.3  39268  7724 ?        Ssl  11:43   0:00 /opt/gitlab/embedded/bin/redis-server 127.0.0.1:0                     
root     11114  0.1  0.0   4212   436 ?        Ss   11:43   0:00 runsv redis  
gitlab-+ 11131  0.0  0.3  39268  7732 ?        Ssl  11:43   0:00 /opt/gitlab/embedded/bin/redis-server 127.0.0.1:0                     
tony	 12007  0.0  0.0  15944   920 pts/6    S+   11:44   0:00 grep --color=auto redis