Re-enable slave rebooter.

--HG--
extra : transplant_source : A%3F%16%98%ED%14%20%8B%BE%00%BE%8A1%5B%B9%9B%2CWc%DC
Bump buildtools package version to pick up new slave reboot script. r=versionbump
Merge from default

--HG--
branch : production
No bug: update from LDAP, adding cn=team_storage and reflecting changes to cn=releng
Merge default -> production

--HG--
branch : production