Handle differences in $ref for the location-independent ref remote.

See #454 (comment)

Author: Julian

remotes/locationIndependentIdentifier.json

@@ -4,7 +4,7 @@
             "$ref": "#foo"
         },
         "A": {
-            "id": "#foo",
+            "$anchor": "foo",
             "type": "integer"
         }
     }

remotes/locationIndependentIdentifierDraft4.json

@@ -0,0 +1,11 @@
+{
+    "definitions": {
+        "refToInteger": {
+            "$ref": "#foo"
+        },
+        "A": {
+            "id": "#foo",
+            "type": "integer"
+        }
+    }
+}

remotes/locationIndependentIdentifierPre2019.json

@@ -0,0 +1,11 @@
+{
+    "definitions": {
+        "refToInteger": {
+            "$ref": "#foo"
+        },
+        "A": {
+            "$id": "#foo",
+            "type": "integer"
+        }
+    }
+}

tests/draft4/refRemote.json

@@ -171,7 +171,7 @@
     {
         "description": "Location-independent identifier in remote ref",
         "schema": {
-            "$ref": "http://localhost:1234/locationIndependentIdentifier.json#/definitions/refToInteger"
+            "$ref": "http://localhost:1234/locationIndependentIdentifierDraft4.json#/definitions/refToInteger"
         },
         "tests": [
             {

tests/draft6/refRemote.json

@@ -196,7 +196,7 @@
     {
         "description": "Location-independent identifier in remote ref",
         "schema": {
-            "$ref": "http://localhost:1234/locationIndependentIdentifier.json#/definitions/refToInteger"
+            "$ref": "http://localhost:1234/locationIndependentIdentifierPre2019.json#/definitions/refToInteger"
         },
         "tests": [
             {

tests/draft7/refRemote.json

@@ -196,7 +196,7 @@
     {
         "description": "Location-independent identifier in remote ref",
         "schema": {
-            "$ref": "http://localhost:1234/locationIndependentIdentifier.json#/definitions/refToInteger"
+            "$ref": "http://localhost:1234/locationIndependentIdentifierPre2019.json#/definitions/refToInteger"
         },
         "tests": [
             {