Generate the SSKey data type from the ssconf constants
Generate the SSKey data type from the ssconf constants

In particular, the constructor names are derived from the list of all
valid ssconf keys.

Signed-off-by: Petr Pudlak <9d19625f8ee825a2c398462ed335cbcf98f79c32@google.com>
Reviewed-by: Helga Velroyen <2d0126b1ec6f9ec5cbec4a7012aa14faeaef10f5@google.com>

yiannist/ganeti,grnet/snf-ganeti,mbakke/ganeti,leshchevds/ganeti,andir/ganeti,yiannist/ganeti,onponomarev/ganeti,andir/ganeti,grnet/snf-ganeti,ganeti/ganeti,mbakke/ganeti,andir/ganeti,bitemyapp/ganeti,leshchevds/ganeti,ganeti/ganeti,onponomarev/ganeti,bitemyapp/ganeti,leshchevds/ganeti,ganeti/ganeti,yiannist/ganeti,mbakke/ganeti