Example of handling Sensitive:true / encrypted values for PAN-OS

[migara]

In some cases PAN-OS returns encrypted values in the response, and we need to handle these cases when storing it in the state.

[shinmog]

Handling encrypted values means adding a single Computed: true map to the resource. This map will hold both the unencrypted and encrypted values. The key into this map is a unique string that defines where the encrypted value resides within the normalized object.

There are a few places in scm where it needs to deal with encrypted values, and while some changes will be needed when porting it over here, for the most part it is a straight port over. The only work that needs to be done is determining how to refer to encrypted value within the config struct as a whole.

[migara]

more context here #89