Split vault tests in different files.

This change split vault tests in several files, organized by vault
type and operation (vault vs. member) so that it is easier to add
new tests for issues and verify if tests are missing.

tests/vault/test_vault_members.yml

@@ -0,0 +1,20 @@
+---
+- name: Test vault
+  hosts: ipaserver
+  become: true
+  # Need to gather facts for ansible_env.
+  gather_facts: true
+
+  tasks:
+  - name: Test vault module member operations.
+    include_tasks:
+      file: tasks_vault_members.yml
+      apply:
+        tags:
+          - "{{ vault.vault_type }}"
+    loop_control:
+        loop_var: vault
+    loop:
+      - { name: "stdvault", vault_type: "standard" }
+      - { name: "symvault", vault_type: "symmetric" }
+      - { name: "asymvault", vault_type: "asymmetric" }