Rewrite TestAddSingleFileToNonExistDir to not use fixtures

Signed-off-by: Alexandr Morozov <lk4d4@docker.com>
Upstream-commit: 139b6ed3aa81d5d3c6ceaacc5041afca4d39d75a
Component: engine

components/engine/integration-cli/build_tests/TestAdd/SingleFileToNonExistDir/Dockerfile

@@ -1,9 +0,0 @@
-FROM busybox
-RUN echo 'dockerio:x:1001:1001::/bin:/bin/false' >> /etc/passwd
-RUN echo 'dockerio:x:1001:' >> /etc/group
-RUN touch /exists
-RUN chown dockerio.dockerio /exists
-ADD test_file /test_dir/
-RUN [ $(ls -l / | grep test_dir | awk '{print $3":"$4}') = 'root:root' ]
-RUN [ $(ls -l /test_dir/test_file | awk '{print $3":"$4}') = 'root:root' ]
-RUN [ $(ls -l /exists | awk '{print $3":"$4}') = 'dockerio:dockerio' ]