We need an ECR credential schema that can be issued by a Legal Entity

[rc-provenant]

There is only one ACDC schema in the vLEI repo for issuing an ECR credential: "legal-entity-engagement-context-role-vLEI-credential.json" with a SAID of "EEy9PkikFcANV1l7EHukCeXqrzT1hNZjGlUk7wuMO5jw"; it assumes that the ECR vLEI will be issued by a QVI and the Legal Entity has issued the QVI an ECR AUTH. The 'auth' property is required in the edges block.

We need a version of the schema that can be used when a Legal Entity wants to issue the ECR vLEI itself and no ECR AUTH is required.

[m00sey]

The edges object does not require anything:

What it does say is it needs to contain one of:

• a single said
• an object containing an attribute "auth"
• an object containing an attribute "le"

The auth value in the required array here:

vLEI/schema/acdc/legal-entity-engagement-context-role-vLEI-credential.json

Lines 130 to 134 in 3ce1dea

	"required": [
	"d",
	"auth"
	]
	},

is for the object contained within the e object. Likewise with the le object.
If the e object contains and object vs a string, then that object must either have a property named auth or le

So something like:

  "e": {
    "d": "EBDmgKOAEwnMGsofWg2m0l63J1awfJafqJyCzTnVkdSw",
    "auth": {
      "n": "Et2DOOu4ivLsjpv89vgv6auPntSLx4CvOhGUxMhxPS24",
      "s": "EH6ekLjSr8V32WyFbGe1zXjTzFs9PkTYmupJ9H65O14g",
      "o": "I2I"
    }
  },

is valid.

or

  "e": {
    "d": "EBDmgKOAEwnMGsofWg2m0l63J1awfJafqJyCzTnVkdSw",
    "le": {
      "n": "Et2DOOu4ivLsjpv89vgv6auPntSLx4CvOhGUxMhxPS24",
      "s": "ENPXp1vQzRF6JwIuS-mp2U8Uf1MoADoP_GqQ62VsDZWY"
    }
  },

is valid.

I've added tests for each of the valid formats here:
https://github.com/WebOfTrust/vLEI/pull/74/files