Setting credential_type as required (#14651)

* Setting credential_type as required

* Added test for missing credential_type in credential module

* Corrected test assertion

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

awx_collection/plugins/modules/credential.py

@@ -58,6 +58,7 @@ options:
           Insights, Machine, Microsoft Azure Key Vault, Microsoft Azure Resource Manager, Network, OpenShift or Kubernetes API
           Bearer Token, OpenStack, Red Hat Ansible Automation Platform, Red Hat Satellite 6, Red Hat Virtualization, Source Control,
           Thycotic DevOps Secrets Vault, Thycotic Secret Server, Vault, VMware vCenter, or a custom credential type
+      required: True
       type: str
     inputs:
       description:
@@ -214,7 +215,7 @@ def main():
         copy_from=dict(),
         description=dict(),
         organization=dict(),
-        credential_type=dict(),
+        credential_type=dict(required=True),
         inputs=dict(type='dict', no_log=True),
         update_secrets=dict(type='bool', default=True, no_log=False),
         user=dict(),