Refactor read info classes using a super class

[bheuvel]

Closes #172
Closes #150

Implement a super class, ReadTransportInfo, for ReadSSHInfo, ReadWinrmInfo and ReadRdpInfo.

[coveralls]

Changes Unknown when pulling 8343f02 on refactor_read_info into ** on master**.

[bheuvel]

Running RSpec tests in folder : vmlifecycle
Using Vagrant file            : Vagrantfile.advanced_networking

VM Life Cycle
  starts Linux and Windows VM
  destroys Linux and Windows VM

Finished in 2 minutes 48.2 seconds (files took 0.13955 seconds to load)
2 examples, 0 failures

Running RSpec tests in folder : networking
Using Vagrant file            : Vagrantfile.advanced_networking

Networking features
  creates firewall and portwarding rules for both Virtual Router and VPC

Finished in 2 minutes 48.7 seconds (files took 0.09559 seconds to load)
1 example, 0 failures

Running RSpec tests in folder : rsync
Using Vagrant file            : Vagrantfile.advanced_networking

VM RSync
  does rsync to the VM

Finished in 49.84 seconds (files took 0.09467 seconds to load)
1 example, 0 failures

[MichielCuijpers]

Nice work @bheuvel you cleaned this #SpringCleaning issue. When this PR is accepted, please send your postal address to bettercodehub@sig.eu if you like to receive your book. Best Regards Michiel

[MichielCuijpers]

@bheuvel the book is on its way. Thanks for joining this years OpenSourceSpringCleaning.