[INFRA-107,INFRA-139] - Update IRC bot to build24

Signed-off-by: Oleg Nenashev <o.v.nenashev@gmail.com>
Merge pull request #43 from oleg-nenashev/staging

[INFRA-107,INFRA-139] - Update IRC bot to build24
Add the newly created OSUOSL VM `lettuce`
Merge pull request #44 from rtyler/provision-lettuce

Add the newly created OSUOSL VM `lettuce`
Merge pull request #45 from jenkins-infra/staging

Roll lettuce and new ircbot