Add custom-checks.json

custom-checks.json

+{
+    "$schema": "https://git.opendatafrance.net/validata/validata-py/raw/master/custom_checks_schema.json",
+    "title": "Validations personnalisées en complément du schéma SCDL Subventions",
+    "author": "Pierre Dittgen, Jailbreak",
+    "version": "0.1",
+    "created": "2018-06-05",
+    "homepage": "https://git.opendatafrance.net/",
+    "checks": [
+        {
+            "name": "french-siret-value",
+            "params": {
+                "column": "idAttribuant"
+            }
+        },
+        {
+            "name": "french-siret-value",
+            "params": {
+                "column": "idBeneficiaire"
+            }
+        }
+    ]
+}