Expand maximum hostlist ranges from 12k to 64k elements.
Revert hostlist range size

Revert commit 626be3ea224a48a688ba62f2cc58c0ffc60eb770
It was causing stack overflow and memory corruption
start a reservations jobs asap

Initiate jobs pending to run in a reservation as soon as the reservation
becomes active.
Partial fix for bug 455
Expand hostlist range count

Increase maximum number of hostlist ranges from 12k to 64k and
use malloc to allocate memory rather than using the stack
bug 458