Implements log file retrieval from the guest agent. The contents
of the log file are pushed up to a swift container as a series of
objects that represent a subset of the lines in the log.
The following trove CLI commands are implemented:
trove log-list <instance> : lists log files available on guest
trove log-enable <instance> <log> : enables writing to log file
trove log-disable <instance> <log>: disables writing to log file
trove log-publish <instance> <log>: publishes updates to swift container
trove log-discard <instance> <log>: discards published logs
trove log-tail <instance> <log> : displays last lines of log
trove log-save <instance> <log> : saves the entire log to a file
Change-Id: Ic15c455747b9f1966d83d7034c9b748ca5e2cce9
Co-Authored-By: Morgan Jones <morgan@tesora.com>
Co-Authored-By: Alex Tomic <atomic@tesora.com>
Co-Authored-By: Peter Stachowski <peter@tesora.com>
fb33d87fef