don't set git config, as the home directory is not accessible here

dockerfiles/bionic.docker

@@ -35,9 +35,7 @@ RUN apt-get update && \
 RUN echo "Defaults set_home" >> /etc/sudoers && \
     echo 'Acquire::http::proxy "http://xfelproxy.desy.de:3128/";' > /etc/apt/apt.conf && \
     echo 'http_proxy=http://xfelproxy.desy.de:3128' >> /etc/environment && \
-    echo 'https_proxy=https://xfelproxy.desy.de:3128' >> /etc/environment && \
-    sudo -H -u msk_jenkins git config --global http.proxy http://xfelproxy.desy.de:3128 && \
-    sudo -H -u msk_jenkins git config --global https.proxy http://xfelproxy.desy.de:3128
+    echo 'https_proxy=https://xfelproxy.desy.de:3128' >> /etc/environment
    
 # NOTE: This last line (symlink for libzmq.so.3) is a hack for a bug in DOOCS serverlib, which has the version number hardcoded.
    

dockerfiles/tumbleweed.docker

@@ -22,9 +22,7 @@ RUN zypper refresh && \
     useradd -u 30996 msk_jenkins && \
     ln -sfn /usr/lib64/libzmq.so.5 /usr/lib64/libzmq.so.3
 
-RUN echo "Defaults set_home" >> /etc/sudoers  && \
-    sudo -H -u msk_jenkins git config --global http.proxy http://xfelproxy.desy.de:3128 && \
-    sudo -H -u msk_jenkins git config --global https.proxy http://xfelproxy.desy.de:3128
+RUN echo "Defaults set_home" >> /etc/sudoers
 
 # NOTE: This last line (symlink for libzmq.so.3) is a hack for a bug in DOOCS serverlib, which has the version number hardcoded.
 

dockerfiles/xenial.docker

@@ -36,10 +36,8 @@ RUN apt-get update && \
 RUN echo "Defaults set_home" >> /etc/sudoers && \
     echo 'Acquire::http::proxy "http://xfelproxy.desy.de:3128/";' > /etc/apt/apt.conf && \
     echo 'http_proxy=http://xfelproxy.desy.de:3128' >> /etc/environment && \
-    echo 'https_proxy=https://xfelproxy.desy.de:3128' >> /etc/environment && \
-    sudo -H -u msk_jenkins git config --global http.proxy http://xfelproxy.desy.de:3128 && \
-    sudo -H -u msk_jenkins git config --global https.proxy http://xfelproxy.desy.de:3128
-   
+    echo 'https_proxy=https://xfelproxy.desy.de:3128' >> /etc/environment
+
 # NOTE: This last line (symlink for libzmq.so.3) is a hack for a bug in DOOCS serverlib, which has the version number hardcoded.
 
 ADD lcov-to-cobertura-xml /common/lcov_cobertura-1.6