Install software-properties-common on debian

Signed-off-by: Philippe Ombredanne <[email protected]>

Author: pombredanne

etc/ci/azure-container-deb.yml

@@ -19,11 +19,13 @@ jobs:
       displayName: Install sudo
 
     - script: |
+        set -ex
         sudo apt-get -y update
         sudo apt-get -y install \
             build-essential \
             xz-utils zlib1g bzip2 libbz2-1.0 tar \
-            sqlite3 libxml2-dev libxslt1-dev
+            sqlite3 libxml2-dev libxslt1-dev \
+            software-properties-common
       displayName: Install required packages
 
     - script: ${{ parameters.install_python }}