labsproxy: switch to use ssl_ciphersuite

we want to remove RC4, per reasoning like in
Icb7313c6f961b897

but we also want this to use ssl_ciphersuite
in the first place to use the global settings

so we are doing that and using the "compat" variety
and nginx obviously, mostly we just used this on Apaches
so far

there are 2 labsproxies, domainproxy and urlproxy,
changed both templates, just once in the role

Change-Id: I136fac78b45aaab3566e9876d302fb19727092bb
mediawiki: remove ssh.override/nice -10 for SSH

Changing the nice level of sshd (or any property of sshd) from the
mediawiki module is just a bad practice. It also breaks overriding ssh
server settings by including ssh::server unconditionally, which is now a
parameterized class and also adds a superfluous upstart dependency.
Remove the stanza entirely; it should be readded to either the ssh or
the base module if there is a need for that.

Change-Id: Ic594062ef33d2106e5974f32bb735c6c4dd2076f
Merge "mediawiki: remove ssh.override/nice -10 for SSH" into production