Proactive static flows have to be allowed in container mode

Proactive static flows have to be allowed in container mode

ISSUE: Once container are created, setting the forwarding mode to proactive for newly
       joined switches does not result in having the punt flows installed
CHANGE: - Have filtering check in install/uninstall/modify function allow internal
          generated flows when in container mode
        - Also removing uneeded dependecy on IfIptoHost in forwardingrulesmanager
        - Also fix some dependencies in sal activator regarding FlowProgrammer service

Change-Id: Id8a69abb2f3fa948195700a50c30fb368264adf9
Signed-off-by: Alessandro Boch <aboch@cisco.com>