tests: return last error when executing commands
tests: return last error when executing commands

lebauce/skydive,lebauce/skydive,skydive-project/skydive,safchain/skydive,skydive-project/skydive,safchain/skydive,lebauce/skydive,skydive-project/skydive,safchain/skydive,skydive-project/skydive,safchain/skydive,lebauce/skydive,safchain/skydive,skydive-project/skydive,safchain/skydive,safchain/skydive,skydive-project/skydive,skydive-project/skydive,safchain/skydive,lebauce/skydive,lebauce/skydive,lebauce/skydive,lebauce/skydive