Merge branch 'integration-test' into 'develop'

.gitignore

.gitlab-ci.yml

build/ci/.build-container.yml

build/ci/.terraform-ci.yml

build/ci/.test.yml

cmd/gnmi-telemetry/telemetry.go

cmd/gnmi/gnmi.go

cmd/gosdn/main.go

forks/goarista/gnmi/operation.go

nucleus/cli-handling.go

nucleus/gnmi_transport_test.go

nucleus/integration_test.go

nucleus/principalNetworkDomain.go

nucleus/principalNetworkDomain_test.go

test/req-full-node

test/req-interfaces-wildcard

test/resp-full-node

test/resp-interfaces-wildcard

test/targets.go

test/terraform/.docker/ca.pem