Merge branch 'content_revision5' into 'master'

.../anselm-cluster-documentation/software/ansys/ansys-cfx.md

...selm-cluster-documentation/software/ansys/ansys-fluent.md

...elm-cluster-documentation/software/ansys/ansys-ls-dyna.md

...ter-documentation/software/ansys/ansys-mechanical-apdl.md

...-the-clusters/graphical-user-interface/x-window-system.md

...novations/obtaining-login-credentials/certificates-faq.md

...btaining-login-credentials/obtaining-login-credentials.md