Modify qa to compute disk template from dev_types
Modify qa to compute disk template from dev_types

The disk template in the QA should not be extracted from the
aggregate information shown, but the disks.

Signed-off-by: Aaron Karper <99cc1031546340b2b8ced5fe338b5890677a56ca@google.com>
Reviewed-by: Michele Tartara <05f7077a2c6cbbdc4af4ba42e3ef89a0df846179@google.com>

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