Use root directory when generating coverage summary

Author: qiluo-msft

.azure-pipelines/build-template.yml

@@ -76,7 +76,6 @@ jobs:
 
         sudo ./tests/tests && redis-cli FLUSHALL && pytest
 
-        cd common
         mkdir -p htmlcov
         gcovr -r ./ --html --html-details -o htmlcov/index.html
         gcovr -r ./ -x -o coverage.xml
@@ -96,6 +95,6 @@ jobs:
     - task: PublishCodeCoverageResults@1
       inputs:
         codeCoverageTool: Cobertura
-        summaryFileLocation: '$(System.DefaultWorkingDirectory)/common/coverage.xml'
+        summaryFileLocation: '$(System.DefaultWorkingDirectory)/coverage.xml'
         reportDirectory: '$(System.DefaultWorkingDirectory)/htmlcov/'
       displayName: 'Publish test coverage'