feature #2468: use VERSION in onehost sync

* Only updates hosts with VERSION value < $REMOTES/VERSION
* Adds VERSION to the host when the update is correct

(cherry picked from commit 826c558941bc58674fbbe9a89908340743bf5c92)
feature #2468: add probe to get remotes version

(cherry picked from commit 1078fea78826814ad45b2961c11e21f08a3b3160)
feature #2468: add --force option to onehost sync

Also prints the hosts selected for upgrade

(cherry picked from commit 0257d5bd7b2e0dc4c78f409db8fdf4eb5d27967f)
feature #2468: Use only one queue for onehost sync

Also prints the percentage of hosts updated

(cherry picked from commit b62925196f3669a97fbe6b3a9daab6fcbbb3b3ec)
feature #2468: add rsync option to onehost sync

(cherry picked from commit 81b045de86cbdfa0019fbcc50c56541bbd068fd8)
feature #2468: fix bug getting probes version

(cherry picked from commit b49454a7f8b10822924398689a2d3ed8c33ea244)