Improve error message when installing the benchmarking canister fails

[ielashi]

If canbench fails to install the benchmarking canister, it currently returns a cryptic error:

Error executing benchmark create_account_bench. Error:
ingress Completed: Reply: 0x4449444c016c01b3c4b1f204680100010a00000000000000000101
ingress Err: IC0503: Canister rwlgt-iiaaa-aaaaa-aaaaa-cai trapped explicitly: failed to decode call arguments: Custom(Cannot parse header 

Caused by:
    binary parser error: io error)
Err: IC0304: Attempt to execute a message on canister rwlgt-iiaaa-aaaaa-aaaaa-cai which contains no Wasm module

canbench should return a more explicit error message that states:

1. The canister installation failed.
2. Why it failed.