Fix reporting of coverage results to coverall.io

When I re-arranged the test-in-docker I didn't realize how .travis.yml
was extracting the results. This should fix it.

When running with test-in-docker we mount the source read-only on
/linux-ro/ inside the container and copy it over to /lorax/ for running
the tests.

The local directory ./.test-results/ is mounted on /test-results/ in the
container and the .coverage file is copied into there so that it is
available on the host.

(cherry picked from commit b61a91954a)

.gitignore

@@ -6,3 +6,4 @@ __pycache__/
 .coverage
 pylint-log
 .pytest_cache/
+.test-results/

.travis.yml

@@ -9,9 +9,7 @@ script:
 after_success:
   - |
 
-        sudo docker create --name results-cont welder/lorax /bin/echo
-        sudo docker cp results-cont:/lorax/.coverage .coverage.docker
-        sudo docker rm results-cont
+        cp .test-results/.coverage ./.coverage.docker
 
         pip install coverage coveralls
         coverage combine

Dockerfile.test

@@ -32,5 +32,6 @@ RUN dnf -y install \
   which && \
   touch /.in-container
 RUN useradd weldr
-VOLUME /lorax
-WORKDIR /lorax
+VOLUME /lorax-ro
+VOLUME /test-results
+WORKDIR /lorax-ro

Makefile

@@ -77,12 +77,13 @@ local:
 	@echo "The archive is in $(PKGNAME)-$(VERSION).tar.gz"
 
 test-in-copy:
-	rsync -aP --exclude=.git /lorax/ /lorax-test/
-	make -C /lorax-test/ check test
+	rsync -aP --exclude=.git /lorax-ro/ /lorax/
+	make -C /lorax/ check test
+	cp /lorax/.coverage /test-results/
 
 test-in-docker:
 	sudo $(DOCKER) build -t welder/lorax-tests:$(IMAGE_RELEASE) -f Dockerfile.test .
-	sudo $(DOCKER) run --rm -it -v `pwd`:/lorax:ro --security-opt label=disable welder/lorax-tests:$(IMAGE_RELEASE) make test-in-copy
+	sudo $(DOCKER) run --rm -it -v `pwd`/.test-results/:/test-results -v `pwd`:/lorax-ro:ro --security-opt label=disable welder/lorax-tests:$(IMAGE_RELEASE) make test-in-copy
 
 docs-in-docker:
 	sudo $(DOCKER) run -it --rm -v `pwd`/docs/html/:/lorax/docs/html/ --security-opt label=disable welder/lorax-tests:$(IMAGE_RELEASE) make docs