Setting credential_type as required (#14651)

* Setting credential_type as required

* Added test for missing credential_type in credential module

* Corrected test assertion

---------

Co-authored-by: Lucas Benedito <lbenedit@redhat.com>

awx_collection/tests/integration/targets/credential/tasks/main.yml

@@ -71,6 +71,19 @@
     that:
       - "result is changed"
 
+- name: Delete a credential without credential_type
+  credential:
+    name: "{{ ssh_cred_name1 }}"
+    organization: Default
+    state: absent
+  register: result
+  ignore_errors: true
+
+- assert:
+    that:
+      - "result is failed"
+
+
 - name: Create an Org-specific credential with an ID with exists
   credential:
     name: "{{ ssh_cred_name1 }}"