client: Object search response payload is unverified

[cthulhu-rider]

server responds to ObjectService.Search with stream of messages containing sets of object IDs. Each object ID must be 32 byte len

Current Behavior

if the next ID has an invalid length:

• Read leaves buffer cell uninitialized w/o an error
• Iterate passes the last valid ID into handler w/o an error

Expected Behavior

op is failed on any invalid ID

Possible Solution

check and fail

Steps to Reproduce

• corresponding tests from Test coverage for Client ops #641

Regression

no

Your Environment

• Version of the product used: 335d9fe