Transactions not being instantiated when receiving a block

[2snEM6]

Expected behavior

Valid blocks with valid transactions should be processed successfully

Actual behavior

When receiving a block from a peer, a call to objectNormalize on the block is performed framework/src/modules/chain/submodules/transport.js:570. This function also used in many places elsewhere expects transactions to be instantiated using their class implementations but the current code doesn't do this and it crashes.

Also, when broadcasting a block transactions are not explicitly converted to JSON by calling .toJSON() transaction's class function. Socketcluster is somewhat stringifying the transaction ES6 class and parsing it at JSON before sending.

Steps to reproduce

Run to nodes, one forging, one now and check the how framework/src/modules/chain/submodules/transport.js:570 throws an error.

Which version(s) does this affect? (Environment, OS, etc...)

release/2.0.0