fix: update catalog dropdowns with appropriate defaults (#456)

Co-authored-by: Jordan-Williams2 <[email protected]>

Author: jor2

ibm_catalog.json

@@ -204,6 +204,7 @@
             {
               "key": "rabbitmq_version",
               "required": true,
+              "default_value": "__NOT_SET__",
               "options": [
                 {
                   "displayname": "3.13",
@@ -554,6 +555,7 @@
             {
               "key": "rabbitmq_version",
               "required": true,
+              "default_value": "__NOT_SET__",
               "options": [
                 {
                   "displayname": "3.13",