Rename ironic-specs to baremetal-specs to fix ACLs

The baremetal-specs repo was created without any acls because the ACLs
were in a file called ironic-specs.config. To make the implicit ACL
lookup work from projects.yaml the ACL file must be called
baremetal-specs.config. Rename the file so that it is a found.

Change-Id: Ief2ca1bc9821e0e53fda2ea9b23084a1d32cd118