Only run maintd tests, if needed disk template available
Only run maintd tests, if needed disk template available

As the maintd tests hard-code the use of drbd as disk template,
we can only run them, if this template is enabled.

Signed-off-by: Klaus Aehlig <4ce51de36d9068cd7db2eec1151e0f3f95419008@google.com>
Reviewed-by: Lisa Velden <f95ae155456787aef400a49db463a62bbef84ead@google.com>

ganeti/ganeti,onponomarev/ganeti,mbakke/ganeti,leshchevds/ganeti,andir/ganeti,ganeti/ganeti,leshchevds/ganeti,leshchevds/ganeti,andir/ganeti,mbakke/ganeti,ganeti/ganeti,mbakke/ganeti,onponomarev/ganeti,andir/ganeti