travis: switch to the Ubuntu Xenial

Signed-off-by: Andrei Vagin <avagin@gmail.com>

.travis.yml

 language: c
 sudo: required
-dist: trusty
+dist: xenial
 cache: ccache
 services:
   - docker

scripts/build/Dockerfile.fedora-asan.hdr

-FROM fedora:27
+FROM fedora:29
 ENV ASAN=1

scripts/travis/Makefile

@@ -16,15 +16,23 @@ ZDTM_OPTIONS :=
 
 alpine: ZDTM_OPTIONS=-x zdtm/static/binfmt_misc -x zdtm/static/netns-nf -x zdtm/static/sched_policy00 -x zdtm/static/seccomp_strict -x zdtm/static/sigaltstack -x zdtm/static/signalfd00 -x zdtm/static/config_inotify_irmap
 
+define DOCKER_JSON
+{
+	"storage-driver": "devicemapper"
+}
+endef
+
+export DOCKER_JSON
 $(TARGETS):
-	echo 'DOCKER_OPTS="--storage-driver=devicemapper"' > /etc/default/docker
-	restart docker
+	echo "$$DOCKER_JSON" > /etc/docker/daemon.json
+	systemctl restart docker
 	$(MAKE) -C ../build $@$(target-suffix)
 	docker run --env-file docker.env --rm -it --privileged -v /lib/modules:/lib/modules --tmpfs /run criu-$@ scripts/travis/travis-tests
 
 fedora-asan:
-	echo 'DOCKER_OPTS="--storage-driver=devicemapper"' > /etc/default/docker
-	restart docker
+	ip6tables -L -n
+	echo "$$DOCKER_JSON" > /etc/docker/daemon.json
+	systemctl restart docker
 	$(MAKE) -C ../build $@$(target-suffix)
 	docker run --rm -it --privileged -v /lib/modules:/lib/modules --tmpfs /run criu-$@ ./scripts/travis/asan.sh $(ZDTM_OPTIONS)
 

test/zdtm.py

@@ -1740,7 +1740,7 @@ class Launcher:
 
 			if sub['log']:
 				with open(sub['log']) as sublog:
-					print(sublog.read().encode('ascii', 'ignore'))
+					print("%s" % sublog.read().encode('ascii', 'ignore').decode('utf-8'))
 				os.unlink(sub['log'])
 
 			return True