Build version advanced to 5987-241
CLOUDIFY-2152 added guava dependency
CLOUDIFY-2152 fix event indexing to set last event index properly
CLOUDIFY-2152 fix last event retrieval
CLOUDIFY-2152 change some logging and unify event retrieval
CLOUDIFY-2152 allow empty events when retrieving last event
CLOUDIFY-2152 fixed error message
Build version advanced to 5987-243
Build version advanced to 5987-250