Knife bootstrap includes `fips true` when in fips mode

[jaym]

If knife has set fips mode, make sure to add it to the client.rb during bootstraps

Tested with basic auth + ssl transport

Some notes:

• ntlm authentication does not work. It uses MD4 and RC4 at some point. When asking openssl to do any of these operations at any point while in fips mode, ruby will refuse the request and raise. What this means is that users will have to use basic auth over ssl or potentially kerberos.

[mwrock]

:+1: on green

[ksubrama]

:+1: Go for it.