feat: added support to use existing event notification instance (#98)

Author: iamar7

ibm_catalog.json

@@ -222,6 +222,13 @@
 							"description": "List of emails to configure event notifications.",
 							"required": false
 						},
+						{
+							"key" : "existing_en_instance_crn",
+							"type": "string",
+							"default_value": "__NULL__",
+							"description": "The CRN of existing event notification instance. If not supplied, a new instance is created.",
+							"required": false
+						},
 						{
 							"key": "existing_secrets_manager_crn",
 							"type": "string",

stack_definition.json

@@ -48,6 +48,13 @@
       "default": [],
       "custom_config": {}
     },
+    {
+      "name": "existing_en_instance_crn",
+      "required": false,
+      "type": "string",
+      "default": "__NULL__",
+      "custom_config": {}
+    },
     {
       "name": "existing_secrets_manager_crn",
       "required": false,
@@ -177,6 +184,10 @@
           "name": "existing_cos_instance_crn",
           "value": "ref:../../members/1b - Object storage/outputs/cos_instance_id"
         },
+        {
+          "name": "existing_en_instance_crn",
+          "value": "ref:../../inputs/existing_en_instance_crn"
+        },
         {
           "name": "skip_cos_kms_auth_policy",
           "value": true