Do not _GatherAndLinkBlockDevs in AcceptInstance
Do not _GatherAndLinkBlockDevs in AcceptInstance

This is now done in the _OpenInstanceDisks() helper in a unified way.

Signed-off-by: Dimitris Aragiorgis <8992e927ab55b53c387d13535e46c0dabc9b84a2@gmail.com>
Reviewed-by: Hrvoje Ribicic <be5828fca31f89218048bec4189e30a581aa65da@google.com>

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