List all provider's hardware profiles

Added tab 'Hardware Profiles' to provider's details. User is now abled
to see all hardware profiles of defined provider. The patch includes
cucumber test for displaying hardware profile under provider.

https://github.com/aeolusproject/conductor/issues/319
fix secret_token initialization
Merge pull request #323 from jzigmund/list_hwp

List all provider's hardware profiles
Merge pull request #301 from martinpovolny/sekreeet

fix secret_token initialization