use some GHA groups

tests/lib_ci.sh

@@ -9,12 +9,23 @@ fail() {
   exit 1
 }
 
+function begingroup {
+  echo "::group::$@"
+  set -x
+}
+
+function endgroup {
+  set +x
+  echo "::endgroup"
+}
+
 setup_container() {
   /usr/bin/env python --version
-  # prepare lxc container template
+  begingroup "Preparing LXC container template"
   if ! $WORKSPACE/tests/tunneldigger.py --setup bionic ; then
     fail "While compiling the setup"
   fi
+  endgroup
 }
 
 test_client_compile() {
@@ -39,21 +50,25 @@ test_nose() {
   local new_rev=$(git rev-parse $2)
 
   cd $WORKSPACE/tests/
-  echo && echo "## Old client, new server" && echo
+  begingroup "Old client, new server"
   if ! CLIENT_REV=$old_rev SERVER_REV=$new_rev nosetests3 --nocapture test_nose.py ; then
     fail "while running test_nose cli <> server.\nclient: '$old_rev'\nserver: '$new_rev'"
   fi
-  echo && echo "## Old server, new client" && echo
+  endgroup
+  begingroup "Old server, new client"
   if ! CLIENT_REV=$new_rev SERVER_REV=$old_rev nosetests3 --nocapture test_nose.py ; then
     fail "while running test_nose cli <> server.\nclient: '$new_rev'\nserver: '$old_rev'"
   fi
+  endgroup
 }
 
 test_usage() {
   local new_rev=$(git rev-parse $1)
 
   cd $WORKSPACE/tests/
+  begingroup "Running usage test"
   if ! CLIENT_REV=$new_rev nosetests3 --nocapture test_usage.py ; then
     fail "while running usage tests."
   fi
+  endgroup
 }