core: use batchRecover in create-control-program
core: use batchRecover in create-control-program

Other batch endpoints besides create-control-program use the
`batchRecover` function to format error responses and to recover
from panics. The `create-control-program` handler slipped through
the cracks.

Closes #333

chain/chain,chain/chain,chain/chain,chain/chain,chain/chain,chain/chain