Compiled Protos for Golang

Pre-requisites:

Golang: sample instructions (Version 1.15 or above)
Protoc (Protobuf compiler): Golang should already be installed and configured.
- Default method: Run the following with sudo if necessary. This will install both the protobuf compiler and the Go code generator plugin.
```
apt-get install protobuf-compiler
go get -u google.golang.org/protobuf/cmd/protoc-gen-go
go get -u google.golang.org/grpc/cmd/protoc-gen-go-grpc
```
- If the above method installs an older version of protoc (check using protoc --version), say below 3.12.x, you should download pre-compiled binaries instead. (With an older version, you may see errors while attempting to launch and setup the Fabric networks).
```
sudo apt-get remove protobuf-compiler
curl -LO https://github.com/protocolbuffers/protobuf/releases/download/v3.15.6/protoc-3.15.6-linux-x86_64.zip
sudo apt-get install unzip
unzip protoc-3.15.6-linux-x86_64.zip -d <some-folder-path>
export PATH="$PATH:<some-folder-path>/bin"
go get -u google.golang.org/protobuf/cmd/protoc-gen-go
go get -u google.golang.org/grpc/cmd/protoc-gen-go-grpc
```
  Note: The latest version at present is 3.15.6, but you should check the above link to find the most current version before running the above steps.

Steps to Build:

To build, run:

make build

To clean, run:

make clean

To clean the builds, run:

make clean-build

Steps to Use

Just add github.com/hyperledger/cacti/weaver/common/protos-go to your imports, to use it.
Run go mod tidy to populate your go.mod with the latest version.

Publish

After building, pushing into github already publishes it.
To have proper versions (by default go uses commit id as version if there are no git tag created), tag the commit in Git, with format: common/protos-go/va.b.c, where:
- a: Major Version.
- b: Minor Version.
- c: Patch Version.