Increase the resharding critical section timeout value for resharding_large_number_of_initial_chunks.js

Resharding test fixture sets the value for resharding critical section timeout server parameter to 24 hours. resharding_large_number_of_initial_chunks.js does not use resharding test fixture and so uses the default value of 5 seconds. This can cause spurious failures during periods of time where the test hosts are being particularly slow.