Also adds a new var, used by the prepare_tests role, to prevent it from
deleting the temp test directory at the start of each play to avoid any
potential race conditions
Instead of getting rid of pipes.quote, use pipes.quote and get rid of
the manually entered toplevel quotes. This should properly escape
backslashes, quotes, and other characters.
Also fix the new checksumming python "one-liner" for csh.
ansible_shell_type needs to be set to csh.
Fixes#10363Fixes#10353