Create ansible playbook to run bt-0000-0001

[ShyamsundarR]

Currently the bench test provided in bt-0000-0001 is expected to be run by hand. We need to convert this into an ansible playbook, for more generic use.

[ShyamsundarR]

Changes to the script that are needed for this to happen are as follows,

• Environment variable CLIENT_LIST needs to be passed in as an argument
• Environment variable SERVER_LIST needs to be passed in as an argument
• Install IOZone using a play rather than using python code as is now (issue Use an ansible play to install IOZone instead of via glusterbench.py #25)
• Install smallfile tools using a play rather than using python code as is now
• Remove the dependency that the script is run from one of the clients, IOW use a jump host of sorts to run the test on the actual setup, not from the host running the ansible play
• Transfer clients.ioz file to the junm host running the test
• Determine how to show progress when this is running via ansible
• Improve report to state KB/s or MB/s like qualifications for the numbers generated
• more to follow...

[mulbc]

CLIENT_LIST could be play_hosts[:1] (all servers in the current run except the first)
thus making
SERVER_LIST to play_host[1]

my 2c