Change script interpreter to /bin/sh to run on platforms that don't have
bash installed by default
Add client_history_timeout attribute to common hub control.

Redmine: #6669
Merge pull request #2065 from kacfengine/no_bash

Change script interpreter to /bin/sh to run on platforms that don't have
Include rpmvercmp in list of binaries used by testall.
Merge pull request #2071 from kacfengine/rpmvercmp

Include rpmvercmp in list of binaries used by testall.
Update Changelog.
Merge pull request #2070 from maciejmrowiec/master

Add client_history_timeout attribute to common hub control.