Removing all accounts from cost center throws errors

[jniles]

A bug exists in the cost allocation module (/cost_center/allocation/). When attempting to unassign all accounts using the table header checkbox, the server throws an "Unexpected End Of Input" error.

Steps to Reproduce

1. Navigation to the cost center allocations module (/cost_center/allocation)
2. Choose a cost center from the drop down
3. Check all accounts to assign to that cost center and submit
4. Check all accounts to unassign (retirer) and submit
5. Observe the console errors.

Expected Results No errors!

This probably is an issue with the size of the JSON being posted to the server. The controller using JSON.stringify(accounts) to POST data back to the server. We might need to design a better API endpoint that takes only account IDs instead.