Update .gitignore for client libs.

Dependencies

• [2] SPJCFHXW Update shell scripts to point to https://aftok.com and prompt for input.
• [*] ADMKQQGC Initial empty Snap project.

Change contents

• edit in .gitignore at line 19
  [2.7]
  +

  + docker-conf

  + client/.pulp-cache