Add showcase role, rationalise fabric
Add puppet-harden and fail2ban
Add fail2ban, harden.  Fix virtualenvwrapper issues
Add a few more handy utilities (thanks, HMRC)
Slight change to discrepancies feature test
add scenario to feature and remove unneeded failed payment section
added discrepancy resolution for gross pay arrears
changes to existing feature tests to reflect arrears of pay discrepancy resolution