Fix remote pipeline (#2023)

deployment/docker/Dockerfile

@@ -52,7 +52,7 @@ RUN python3 -m pip --no-cache-dir install Keras==2.1.6
 # PyTorch
 #
 RUN python3 -m pip --no-cache-dir install torch==1.2.0
-RUN python3 -m pip install torchvision==0.4.0
+RUN python3 -m pip install torchvision==0.5.0
 
 #
 # sklearn 0.20.0

test/pipelines-it-remote.yml

@@ -20,31 +20,31 @@ jobs:
     displayName: 'Install dependencies for integration tests in remote mode'
   - task: CopyFilesOverSSH@0
     inputs:
-      sshEndpoint: remote_nni-ci-gpu-01
+      sshEndpoint: $(end_point)
       sourceFolder: deployment/pypi/dist/
       targetFolder: /tmp/nnitest/$(Build.BuildId)/dist
       overwrite: true
     displayName: 'Copy dist files to remote machine'
   - task: CopyFilesOverSSH@0
     inputs:
-      sshEndpoint: remote_nni-ci-gpu-01
+      sshEndpoint: $(end_point)
       sourceFolder: test
       targetFolder: /tmp/nnitest/$(Build.BuildId)/test
       overwrite: true
     displayName: 'Copy test files to remote machine'
   - task: SSH@0
     inputs:
-      sshEndpoint: remote_nni-ci-gpu-01
+      sshEndpoint: $(end_point)
       runOptions: commands
       commands: python3 /tmp/nnitest/$(Build.BuildId)/test/remote_docker.py --mode start --name $(Build.BuildId) --image nni/nni
     displayName: 'Start docker'
   - task: DownloadSecureFile@1
     inputs:
-      secureFile: remote_ci_private_key
+      secureFile: $(remote_private_key)
   - script: |
-      cp $(Agent.TempDirectory)/remote_ci_private_key test/id_rsa
+      cp $(Agent.TempDirectory)/$(remote_private_key) test/id_rsa
       chmod 600 test/id_rsa
-      scp -i test/id_rsa $(remote_user)@$(remote_host):/tmp/nnitest/$(Build.BuildId)/port test/port
+      scp -P $(remote_port) -i test/id_rsa $(remote_user)@$(remote_host):/tmp/nnitest/$(Build.BuildId)/port test/port
       cat test/port
     displayName: 'Get docker port'
   - script: |