[Enabler][Portability] [zos_encode] Ensure test suite portability by removing hard coded data.

[fernandofloresg]

Enabler description

This issue is tracked by epic: [Epic][Portability] Ensure test suite execution portability & parallelism.

Issue:

In order to ensure test portability and parallel execution we need to remove data set names and user names that are hardcoded. In this test the following needs to be removed:

• [ ] Just need to remove the variable assign to MVS_PS and similar, that could mislead us.

Ansible module

zos_encode