Removing baremetal tests from tempest tree

ironic project now has a tempest plugin and its tests will be maintained there.

Closes-Bug: #1614516
Depends-On: I0b7e32dfad2ed63f9dd4d7cad130da39bc869a8a
Change-Id: Id518a6d87d0949737cd1c50cb6a83149b85e5f85
27 files changed