[OpenID-Specs-eKYC-IDA] Issue #1237: Add LEI issuer claim (openid/ekyc-ida)

[nfujie]

New issue 1237: Add LEI issuer claim
https://bitbucket.org/openid/ekyc-ida/issues/1237/add-lei-issuer-claim

Naohiro Fujie:

Feedback from METI to the authority claims/regal entity.

Comment:

* there are at least 2 legal entity identifier issuers in Japan, GLEIF, Ministry of Justice.

Proposal:

* add lei\_issuer claim for legal entity

```json
"authority": [ {
  "applies_to": {
    "company_name": "Example Company Limited",
    "jurisdiction": "england-wales",
    "lei": "1234567",
    "lei_issuer": "GLEIF"   <-- add issuer of the LEI
  },
```

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