Init Actor Test Coverage

[vyzo]

Initial Coverage

|| actors/init/src/lib.rs: 41/55
|| actors/init/src/state.rs: 17/19

Unit tests to migrate/check

init $ go test -v ./... | grep PASS | sed 's/--- PASS:/- [ ]/g' | sed 's/ (.*)//g' | grep -v PASS

• TestConstructor
• TestExec
  • TestExec/abort_actors_that_cannot_call_exec
  • TestExec/happy_path_exec_create_2_payment_channels
  • TestExec/happy_path_exec_create_storage_miner
  • TestExec/happy_path_create_multisig_actor
  • TestExec/sending_to_constructor_failure

[lemmih]

Hi @vyzo and @jennijuju. Unless I'm mistaken, these tests have already been ported to rust. Feel free to reopen the issue if you disagree.