* I seem to have forgotten the back half of tests
* Set http timeout from persistent_command_timeout
* Tweak URL generation and provide URL on error
* Push var_options to connection process
* Don't wait forever if coming from persistent
* Don't send the entire contents of variables to ansible-connection
On setup we set it to 'switch', so teardown should be 'switch'.
Also, using inventory_hostname breaks the test, since in our CI
it's a long UUID string, which exceeds the 32 chars maximum for setting
a hostname on NXOS.
