Increase the SVWAIT Timeout

We were getting a couple failed sidekiq restarts every once in a while when running gitlab-ctl restart sidekiq or if we run reconfigure after a change to the gitlab.rb. This seems to fix the problem, the specific wait time is taken from chef's updated supermarket sample app: https://github.com/chef/omnibus-supermarket/commit/4b49e200f43497192075fa612b2c0e3bae914bdd