[FAB-16198] Run "go mod vendor" for FabCar Go contract

FAB-15782 added go.mod files for versioned dependencies,
but "go mod vendor" is never run before deploying the
FabCar Go contract either by the user or in CI.

Signed-off-by: Simon Stone <sstone1@uk.ibm.com>
Change-Id: I958d426ca72938a2051bf95d6ecc4c6e3cd1d7b2

fabcar/startFabric.sh

@@ -15,6 +15,11 @@ CC_SRC_LANGUAGE=`echo "$CC_SRC_LANGUAGE" | tr [:upper:] [:lower:]`
 if [ "$CC_SRC_LANGUAGE" = "go" -o "$CC_SRC_LANGUAGE" = "golang"  ]; then
 	CC_RUNTIME_LANGUAGE=golang
 	CC_SRC_PATH=github.com/hyperledger/fabric-samples/chaincode/fabcar/go
+	echo Vendoring Go dependencies ...
+	pushd ../chaincode/fabcar/go
+	GO111MODULE=on go mod vendor
+	popd
+	echo Finished vendoring Go dependencies
 elif [ "$CC_SRC_LANGUAGE" = "java" ]; then
 	CC_RUNTIME_LANGUAGE=java
 	CC_SRC_PATH=/opt/gopath/src/github.com/hyperledger/fabric-samples/chaincode/fabcar/java