Move refresh_objects into a manage.py command

refs #16203
Installation Docs: Add new refreshcache command instructions

refs #16203
Update VNCAuthProxy to 1.1.1

refs #15321
Merge branch 'bug/15321' into develop

* bug/15321:
  Update VNCAuthProxy to 1.1.1
Merge branch 'bug/16203' into develop

* bug/16203:
  Installation Docs: Add new refreshcache command instructions
  Move refresh_objects into a manage.py command