Convert TestDelay repeat to the type system
Convert TestDelay repeat to the type system

Turns out with the current implementation of the type system a variable
can both be required and not required. Interesting (but perhaps worth a
further look).

Signed-off-by: Guido Trotter <f62ca4d5358bdaeef0e50e57f9f7e231de63727e@google.com>
Reviewed-by: Iustin Pop <acf83a5274f31a43af6b914614365999469c1a31@google.com>

ganeti/ganeti,mbakke/ganeti,yiannist/ganeti,grnet/snf-ganeti,andir/ganeti,bitemyapp/ganeti,andir/ganeti,ganeti-github-testing/ganeti-test-1,leshchevds/ganeti,apyrgio/ganeti,apyrgio/snf-ganeti,onponomarev/ganeti,apyrgio/snf-ganeti,yiannist/ganeti,grnet/snf-ganeti,mbakke/ganeti,apyrgio/ganeti,ganeti-github-testing/ganeti-test-1,onponomarev/ganeti,dimara/ganeti,yiannist/ganeti,ganeti/ganeti,andir/ganeti,dimara/ganeti,leshchevds/ganeti,bitemyapp/ganeti,leshchevds/ganeti,mbakke/ganeti,ganeti/ganeti