The encryption public key, if existent, will be used to encrypt the
user password to be sent to the metadata service.
By default, in case of OpenStack, the first public key set by the user
will be used to encrypt the user password.
This special method is needed by metadata services implementations
which will not rely on the same behaviour, as the the encryption key
can be set at another metadata endpoint.
Partially implements: blueprint packet-metadata-suport
Co-Authored-By: Paula Madalina Crismaru <pcrismaru@cloudbasesolutions.com>
Change-Id: I8bfde766d74dcd09e659d09a33a12f6f50b36ed2
8dd0d9dbc3