Change single Vault pki mount to multi pki mounts paths for etcd and kube CA`s (#1552)

* Added update CA trust step for etcd and kube/secrets roles

* Added load_balancer_domain_name to certificate alt names if defined. Reset CA's in RedHat os.

* Rename kube-cluster-ca.crt to vault-ca.crt, we need separated CA`s for vault, etcd and kube.

* Vault role refactoring, remove optional cert vault auth because not not used and worked. Create separate CA`s fro vault and etcd.

* Fixed different certificates set for vault cert_managment

* Update doc/vault.md

* Fixed condition create vault CA, wrong group

* Fixed missing etcd_cert_path mount for rkt deployment type. Distribute vault roles for all vault hosts

* Removed wrong when condition in create etcd role vault tasks.

roles/vault/tasks/bootstrap/create_etcd_role.yml

@@ -1,9 +1,17 @@
 ---
+- include: ../shared/auth_backend.yml
+  vars:
+    auth_backend_description: A Username/Password Auth Backend primarily used for services needing to issue certificates
+    auth_backend_path: userpass
+    auth_backend_type: userpass
+  delegate_to: "{{ groups.vault|first }}"
+  run_once: true
+
 - include: ../shared/create_role.yml
   vars:
-    create_role_name: "{{ item.name }}"
-    create_role_group: "{{ item.group }}"
-    create_role_policy_rules: "{{ item.policy_rules }}"
-    create_role_options: "{{ item.role_options }}"
-  with_items: "{{ vault_roles }}"
-  when: item.name == "etcd"
+    create_role_name: "{{ vault_etcd_role.name }}"
+    create_role_group: "{{ vault_etcd_role.group }}"
+    create_role_policy_rules: "{{ vault_etcd_role.policy_rules }}"
+    create_role_options: "{{ vault_etcd_role.role_options }}"
+    create_role_mount_path: "{{ vault_etcd_role.mount_path }}"
+  when: inventory_hostname in groups.etcd