Add volume_type related plugins/modules

Added 2 new modules to manipulate volume types in OpenStack
* volume_type is used to create, delete and modify volume type
* volume_type_info is used to show volume_type details, including
  encryption information

ci tests extended with additional role to test basic module behaviour

It is currently impossible to update is_public volume type attribute
as it is being changed to "os-volume-type-access:is_public" which is not
expected by api. Which expects just "is_public"
https://docs.openstack.org/api-ref/block-storage/v3/?expanded=update-a-volume-type-detail#update-a-volume-type
Which results in "'os-volume-type-access:is_public' was unexpected"
reply. I guess the change is required by openstacksdk or on the API side

Change-Id: Idc26a5240b5f3314c8384c7326d8a82dcc8c6171

ci/roles/volume_type/defaults/main.yml

@@ -0,0 +1,12 @@
+---
+volume_backend_name: LVM_iSCSI
+volume_type_name: test_type
+volume_type_description: Test volume type
+volume_type_alt_name: changed_type
+volume_type_alt_description: Changed test volume type
+
+enc_provider_name: nova.volume.encryptors.luks.LuksEncryptor
+enc_cipher: aes-xts-plain64
+enc_control_location: front-end
+enc_control_alt_location: back-end
+enc_key_size: 256

ci/roles/volume_type/tasks/main.yml

@@ -0,0 +1,82 @@
+---
+- name: Create volume type
+  openstack.cloud.volume_type:
+    name: "{{ volume_type_name }}"
+    cloud: "{{ cloud }}"
+    state: present
+    extra_specs:
+      volume_backend_name: "{{ volume_backend_name }}"
+    description: "{{ volume_type_description }}"
+    is_public: true
+  register: the_result
+- name: Check created volume type
+  vars:
+    the_volume: "{{ the_result.volume_type }}"
+  ansible.builtin.assert:
+    that:
+      - "'id' in the_result.volume_type"
+      - the_volume.description == volume_type_description
+      - the_volume.is_public == True
+      - the_volume.name == volume_type_name
+      - the_volume.extra_specs['volume_backend_name'] == volume_backend_name
+    success_msg: >-
+      Created volume: {{ the_result.volume_type.id }},
+      Name: {{ the_result.volume_type.name }},
+      Description: {{ the_result.volume_type.description }}
+
+- name: Test, check idempotency
+  openstack.cloud.volume_type:
+    name: "{{ volume_type_name }}"
+    cloud: "{{ cloud }}"
+    state: present
+    extra_specs:
+      volume_backend_name: "{{ volume_backend_name }}"
+    description: "{{ volume_type_description }}"
+    is_public: true
+  register: the_result
+- name: Check result.changed is false
+  ansible.builtin.assert:
+    that:
+      - the_result.changed == false
+    success_msg: "Request with the same details lead to no changes"
+
+- name: Add extra spec
+  openstack.cloud.volume_type:
+    cloud: "{{ cloud }}"
+    name: "{{ volume_type_name }}"
+    state: present
+    extra_specs:
+      volume_backend_name: "{{ volume_backend_name }}"
+      some_spec: fake_spec
+    description: "{{ volume_type_alt_description }}"
+    is_public: true
+  register: the_result
+- name: Check volume type extra spec
+  ansible.builtin.assert:
+    that:
+      - "'some_spec' in the_result.volume_type.extra_specs"
+      - the_result.volume_type.extra_specs["some_spec"] == "fake_spec"
+    success_msg: >-
+      New extra specs: {{ the_result.volume_type.extra_specs }}
+
+# is_public update attempt using openstacksdk result in unexpected attribute
+# error... TODO: Find solution
+#
+# - name: Make volume type private
+#   openstack.cloud.volume_type:
+#     cloud: "{{ cloud }}"
+#     name: "{{ volume_type_alt_name }}"
+#     state: present
+#     extra_specs:
+#       volume_backend_name: "{{ volume_backend_name }}"
+#       # some_other_spec: test
+#     description: Changed 3rd time test volume type
+#     is_public: true
+#   register: the_result
+
+- name: Delete volume type
+  openstack.cloud.volume_type:
+    cloud: "{{ cloud }}"
+    name: "{{ volume_type_name }}"
+    state: absent
+  register: the_result

ci/run-collection.yml

@@ -53,6 +53,7 @@
     - { role: subnet, tags: subnet }
     - { role: subnet_pool, tags: subnet_pool }
     - { role: volume, tags: volume }
+    - { role: volume_type, tags: volume_type }
     - { role: volume_backup, tags: volume_backup }
     - { role: volume_snapshot, tags: volume_snapshot }
     - { role: volume_type_access, tags: volume_type_access }