CI plugins - update to LR 2.7.5 (cumulative commit)
 - updated lr-api/lr-public-util dependencies, added ZT public repos
 - LibeRebelXml stuff from lr-public-util is now used instead of old embedded
 - ServerKind enum used for generalized server types
 - virtual host support for app servers
 - added All-At-Once strategy
 - added some conf processing tests
 - database schema support added
 - group operations use newer lr-api classes