Refined azure pipeline, and fixed various of compile errors (#271)

* 1. Move from dep to modules

2. Use golangci-lint instead of gometalinter

3. Fixed various of compilation errors

4. Remove the travis pipeline config file

5. Refined azure pipeline config

* Stop using Makefile

* Revert changes on test scripts

* Refactor pipeline

.azure-pipelines/lint_and_build.yml

@@ -0,0 +1,9 @@
+jobs:
+  - job:
+    pool:
+      vmImage: 'Ubuntu 18.04'
+
+    steps:
+      - template: steps/init_workspace.yml
+      - template: steps/linter_check.yml
+      - template: steps/build_test.yml

.azure-pipelines/steps/build_test.yml

@@ -0,0 +1,3 @@
+steps:
+  - script: go build -v $(go list ./...)
+    displayName: 'Build'

.azure-pipelines/steps/init_workspace.yml

@@ -0,0 +1,13 @@
+steps:
+  - script: |
+      mkdir -p $GOPATH
+      mkdir -p '$(GOPATH)/bin'
+      shopt -s dotglob extglob
+      echo '##vso[task.prependpath]$(GOROOT)/bin'
+      echo '##vso[task.prependpath]$(GOPATH)/bin'
+    displayName: 'Create Go Workspace'
+  - script: |
+      go version
+      curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(go env GOPATH)/bin v1.23.6
+      golangci-lint --version
+    displayName: 'Install Dependencies'

.azure-pipelines/steps/linter_check.yml

@@ -0,0 +1,10 @@
+steps:
+  - script: |
+      golangci-lint run --timeout=30m --disable-all \
+      --enable=deadcode --enable=gocyclo --enable=golint \
+      --enable=varcheck --enable=structcheck --enable=maligned \
+      --enable=ineffassign --enable=interfacer --enable=unconvert \
+      --enable=goconst --enable=gosec ./... >&2
+    displayName: 'Linter Check'
+    failOnStderr: true
+    condition: succeededOrFailed()