* device: support for Alcatel OmniPCX Server

* device: support for Alcatel OmniPCX Server - add test data

* rename

* Add a new versatile type of sensor, without unit - doc extension

* tests data updated for omnipcx

* new count test after funny rebase

* clean

* tests

* index in yaml file ...

* Update omnipcx.json

* try to add pbx state

* Change function snmpwalk_cache_oid to allow snmpvalue without index

* testdata

* Adapt the discovery_schema (to allow a non_indexed oid)

* Update snmp.inc.php