purefa_dsrole_old fails(Repost)

[ryuyamag]

Summary
On a FlashArray running Purity//FA 6.5.11, the purestorage.flasharray.purefa_dsrole_old module fails.
I'm using the #895 version.

AttributeError: 'Client' object has no attribute 'patch_directory_service_roles'

Environment
Ansible version: core 2.15.8
FlashArray Collection version: 1.41.0
Purity versions tested: 6.5.11
Module: purefa_dsrole_old
Operation: state: present (create role)

Locally, I was able to resolve the issue by changing following lines.
142 res = array.patch_directory_service_roles(
161 res = array.patch_directory_service_roles(
to
res = array.patch_directory_services_roles(