update generated test files when chaincode metadata has been updated to return more data

[heatherlp]

Under the work I'm doing in #60, I'm calling getMetaData on a smart contract (in fabric 1.3) and using the data to add to the test file we generate.
In a future release, Matthew has plans to update what metadata is returned, so we should update the generated test files once this has been done.

Note: I wont be making use of the "returns" section of the metadata, because I've got no way of knowing what type is returned by submitTransaction, only the value. Also not making use of "title" section of metadata, as the extension knows what the name of the instantiated smart contract is

[heatherlp]

#247 is related I think