Create keystone user prior to keystone server

Prior to this patch keystone user was created before
keystone server installation only if
system.glusterfs.client.volume.keystone was set in the model hence
keystone user was created only by keystone salt state in AIO
models. Keystone user creation prior to keystone server installation is
needed by rsync fernet rotation mechanism. As of now keystone user and
group definition were moved to new linux system class which is
included in system.glusterfs.client.volume.keystone and
system.keystone.server.cluster, single

Related-PROD: PROD-19973
Change-Id: I852b392964040aa41dfbb683095e53bb1cf13f3a
diff --git a/linux/system/users/keystone.yml b/linux/system/users/keystone.yml
new file mode 100644
index 0000000..14e38dd
--- /dev/null
+++ b/linux/system/users/keystone.yml
@@ -0,0 +1,18 @@
+parameters:
+  linux:
+    system:
+      user:
+        keystone:
+          enabled: true
+          name: keystone
+          home: /var/lib/keystone
+          uid: 301
+          gid: 301
+          shell: /bin/false
+          system: True
+      group:
+        keystone:
+          enabled: true
+          name: keystone
+          gid: 301
+          system: True