OS-1669 make it possible to rotate log for running VM.js process
OS-1831 update platform bunyan to 0.18.1
OS-1839: Improve imgadm install message
OS-1798 ON build should use pkgsrc python
OS-1842 switch to Logger.child() for VM actions.
OS-1848 + OS-1849 fix validation on create-snapshot, fix tests for KVM.
OS-1862 fix documentation for tests.
OS-1813 include files from /opt/custom/etc/rsyslog.d/ to extend rsyslog config for GZ persistently.