Support for AIX and targeted SSH testing

[foobarbam]

Add support for AIX platform and ability to test via ssh transport.

See Rakefile ssh task commentary for usage.

All tests pass against my AIX system (lint and docker tests also pass)

foobarbam@polaris:~/src/gems/train$ rake test:ssh[user@server]
Run options: --seed 55229

# Running:

...................................................................................................................

Finished in 714.254213s, 0.1610 runs/s, 0.1694 assertions/s.

115 runs, 121 assertions, 0 failures, 0 errors, 0 skips

[chris-rock]

@foobarbam so cool to see aix support for train. Thanks for adding this. Just ordered my PDP environment for the next days to test it. Get back to you asap.

[chris-rock]

@foobarbam Tested it against AIX 6 and AIX 7.2. Works like a charm. Thank you very much for this great addition.

Test on IBM AIX 6.1

rake "test:ssh[u0016746@172.29.151.232]"         
sh -c cd /Users/chartmann/Development/compliance/train/test/integration && target=u0016746@172.29.151.232 key_files=/Users/chartmann/.ssh/id_rsa ruby -I ../../lib test_ssh.rb tests/*
Run options: --seed 12258

# Running:

...............................................................................................................

Finished in 337.118067s, 0.3411 runs/s, 0.3589 assertions/s.

115 runs, 121 assertions, 0 failures, 0 errors, 0 skips

Test on IBM AIX 7.2 beta

rake "test:ssh[u0016746@172.29.151.240]"
sh -c cd /Users/chartmann/Development/compliance/train/test/integration && target=u0016746@172.29.151.240 key_files=/Users/chartmann/.ssh/id_rsa ruby -I ../../lib test_ssh.rb tests/*
Run options: --seed 35324

# Running:

...............................................................................................................

Finished in 338.617305s, 0.3396 runs/s, 0.3573 assertions/s.

115 runs, 121 assertions, 0 failures, 0 errors, 0 skips

[foobarbam]

you bet man, thanks for the merge