remove `-v` flag from post-rsync `chmod`

OpenBSD `chmod` does not support the `-v` flag, which causes
`vagrant up` to fail.
Merge pull request #3743 from zigg/fix/master/openbsd-rsync-chmod

guests/openbsd: remove `-v` flag from post-rsync `chmod`
Update CHANGELOG.md
communicators/ssh: rescue another exception for reset
core: providers can choose to not be defaultable [GH-3742]
guests/linux: exclude symlinks from chown search [GH-3744]
core: don't double-include package in tar [GH-3637]