Using random salt-thin dir for each salt-ssh call
Using random salt-thin dir for each salt-ssh call

This avoid a race condition when multiple salt-ssh calls are trying to
deploy salt-thin using the same salt-thin dir. The "-w" parameter
would also wipe the deployed salt-thin after each salt-ssh execution.

SUSE/spacewalk-testsuite-base,MalloZup/spacewalk-testsuite-base,0rnela/spacewalk-testsuite-base