Use Template Haskell to generate Disk Objects
Use Template Haskell to generate Disk Objects

...instead of the manual creation. Having a single declaration
not only is easier to read, but it also improves maintainability
as changes have to be carried out in one place only.

Signed-off-by: Klaus Aehlig <4ce51de36d9068cd7db2eec1151e0f3f95419008@google.com>
Reviewed-by: Niklas Hambuechen <98215d3a72cb13cc9c9956528e50119ca7d1fb8b@google.com>

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