XX-10725: empty call rate limit breaks iptables generation

- check if limits for a call rate rule not null befoe tryng to generate iptable rules
XX-10725: empty call rate limit breaks iptables generation

- log only in case no rule limit
XX-10734 - bug fix: group settings are missing from Polycom group. They were mistakenly hidden in previous commit.
UC-11 - PIN Field Missing from Import Help Text
Revert "UC-11 - PIN Field Missing from Import Help Text"

This reverts commit a4cdb74e7d9e1ea328a19bb1c4dce6847bb3dbf1.
UC-1120 SQA warnings logged without any calls
http://track.sipfoundry.org/browse/UC-1120

Changed log level from warning to info for the following messages:
  "StateQueueConnection::onInactivityTimeout No activity on this
  socket for too long."
  "StateQueueConnection::handleRead TERMINATED - Operation canceled
  Most likely remote closed the connection."
UC-1548: Create resource-limits.ini as a central config for fd and core limits

Also fixed task: AdminConfig.replicate is never called

-generic approach: admin settings page sets defaults for proxy, rls, registrar, saa, park, mwi resource limits
each process outlined above can set its own resource limits on their settings page.
Any time admin settings can overwrite the resource limits for all outlined processes above

test added
Revert "UC-1548: Create resource-limits.ini as a central config for fd and core limits"

This reverts commit 4a75e3d11ad5f8f3450a52bc0cb279b527db3497.
UC-11 - PIN Field Missing from Import Help Text
XX-10742: sipxagent route: command not found

- Problem is that PATH is not set when sipxsupervisor is started on system reboot. (under sysv and init.d) but PATH does get set properly when you restart sipxecs or sipxsupervisor from CLI sometime after reboot. Use /sbin/route to prevent this
XX-10743:  Made hop by hop processing of INVITE transaction cancellation configurable.
XX-10743:  Added configuration entry for hop-by-hop CANCEL.
XX-10743: CANCEL for forked calls are not propagated when child transactions are not yet in proceeding state

- new proxy config setting: SIPX_PROXY_HOP_BY_HOP_CANCEL defaults to enabled
XX-10743: CANCEL for forked calls are not propagated when child transactions are not yet in proceeding state

- turn fix off by deafult, should be manually enabled atm
UC-1378:  Introducing ResourceLimit class which allows C++ applications to raise the FD and core size limit inline.
Merge remote-tracking branch 'origin/UC-1378' into UC-1378