ProvisionWatcher support regex for blockingIdentifiers

[ajcasagrande]

🚀 Feature Request

Description [REQUIRED]

Currently, Provision Watchers support regex matching for identifiers, but not for blockingIdentifiers.

In edgexfoundry-holding/device-onvif-camera, an example would be to create a provision watcher for any ONVIF device that is unknown. The idea would be to match any ONVIF camera without a Manufacturer attribute.

"provisionwatcher":{
   "apiVersion":"v2",
   "name":"Provision-Watcher-Unknown",
   "adminState":"UNLOCKED",
   "identifiers":{
      "Address": "."
   },
   "blockingIdentifiers":{
      "Manufacturer": [ ".+" ]
   },
   "serviceName": "device-onvif-camera",
   "profileName": "onvif-camera"
}

Describe the solution you'd like

Unfortunately because it is already implemented using pure string matches, switching to regex could cause unintended side-effects. One option is to use a function that implements exact regex match (versus substring match) (ie. equivalent to ^regex$).

Another option would be to make it an explicit extra field, like so:

 "regexBlockingIdentifiers":{
    "Manufacturer": "."
 },

Describe alternatives you've considered

Create a provision watcher that blocks all Manufacturer values that are already defined in other provision watchers. This is harder to keep track of, as it would need to be updated on a per-install basis based on the other registered provision watchers.

"provisionwatcher":{
   "apiVersion":"v2",
   "name":"Provision-Watcher-Unknown",
   "adminState":"UNLOCKED",
   "identifiers":{
      "Address": "."
   },
   "blockingIdentifiers":{
      "Manufacturer": [ "HIKVISION", "Tapo", "GeoVision", ... ]
   },
   "serviceName": "device-onvif-camera",
   "profileName": "onvif-camera"
}