Reset op status to wating on NotifyRetry
Reset op status to wating on NotifyRetry

When a job is retried, it is effectively reset, so we have to
reset the state back to waiting again. This will also ensure
that we're not unpleasantly surprised when NotifyStart is called
the second time.

Signed-off-by: Klaus Aehlig <4ce51de36d9068cd7db2eec1151e0f3f95419008@google.com>
Reviewed-by: Petr Pudlak <9d19625f8ee825a2c398462ed335cbcf98f79c32@google.com>

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