Added logic to ERB Template to make TMOUT optional
Added logic to ERB Template to make TMOUT optional

Setting the TMOUT env variable should help addresses this Security
Policy:
http://www.security.harvard.edu/enterprise-security-policy/2-confidential-info/policies-2_6
However, *should* the ENV Var need to be unset, you could pass undef to
it now and it won't get set.

huit/puppet-harvard