* removing $graphs global
* remove unused things
* fix some additional graphs
* Fix graphs persisting too soon
* correct name for poller module performance graph
* only one type of graph is used here
Changed some values to be explicitly boolean
DO NOT DELETE THIS TEXT
#### Please note
> Please read this information carefully. You can run `./scripts/pre-commit.php` to check your code before submitting.
- [x] Have you followed our [code guidelines?](http://docs.librenms.org/Developing/Code-Guidelines/)
#### Testers
If you would like to test this pull request then please run: `./scripts/github-apply <pr_id>`, i.e `./scripts/github-apply 5926`
* Extract DiscoveryItem and move some things to better places.
Extract model class
Fix up model construction. I have problem with construction...
Makeshift model working. Switch constructor to factory. discover() and create()
Support legacy discovery.
Remove uneeded custom pollers
Remove netonix custom detection as we try ucd on all os now.
Add a few yaml procs. Fix a couple things.
More processor discovery conversions
Move Calix e7 to standard hrProcessorLoad, but it doesn't fully implement the HR-MIB, move things around to make it work.
Add a few yaml procs. Fix a couple things. Correct some stupid mib stuff.
Move more, drop php 5.3
Add netscaler which uses string indexes. Port fiberhome to yaml and use skip_values
More conversions. BroadcomProcessorUsage Trait
Serveriron and Ironware share some mibs. Create a common abstract os for them.
Add yaml support for mib specification in each data entry
Make legacy discover_processor() set 0 for hrDeviceIndex
Untangle Dell switch OS processors
Use use shared OS for groups if they don't have a specific group.
fix silly mib mistake
Make index optional
Move HR and UCD to Traits and out of Processor.
* forgot to update the fortiswitch index
* Make sgos and avaya-ers match the old index.
* fix comware test data
* fix merge errors
* fix dsm and remove pointless empty modules
* file not found exception is in the wrong place.
* Updated processor development docs
