Move to separate dependencies for shim, logger and protos that are no longer in main fabric repo

[dasormeter]

1) Resolve dependencies that are no longer available in main fabric github repo 2) Vendor all dependencies so that chaincode can be uploaded across multiple fabric versions 3) Explicitly specify 1.4.4 docker image for fabric as the 2.0, 2.0.0-alpha and 2.0.0-beta images are unreliable as to the state of code contained within 4) Export IMAGE_TAG_FABRIC environment variables from fabric.sh so they are available to calling script

• Update shim, proto/peer and logging dependencies as they no longer exist in main hyperledger/fabric repo
• Use github.com/hyperledger/fabric-chaincode-go/shim
• Use github.com/hyperledger/fabric-protos-go/peer
• Use github.com/op/go-logging and logging.MustGetLogger instead of shim.Logging as that no longer exists

[dasormeter]

hi @mrtea-hacera @hacera-jonathan @hacera-pakki : could you please review this PR and approve or advise if you can think of an alternate way of freezing dependencies? It addresses the problem noted in https://github.com/hacera/daml-on-fabric/issues/17

[hacera-jonathan]

Thanks everyone!