Introduce local boot test case for QCOW2

The tests works by executing osbuild with predefined pipeline. Then the
image boots and the testing script creates SSH connection to the running
VM. If everything goes fine `systemctl is-system-running` is executed
with result `running` and the test case passed.

The JSON definition of the test case contains also a blueprint that
should generate the desired pipeline, but it didn't work for me, so I'm
including it for future use from the golang unit tests.

.travis.yml

@@ -19,4 +19,13 @@ matrix:
       script:
         # ubuntu's rpm package sets dbpath to ~/.rpmdb, which makes rpm fail...
         - sudo sh -c 'mkdir /etc/rpm; echo "%_dbpath /var/lib/rpm" > /etc/rpm/macros'
-        - sudo env "PATH=$PATH" "OSBUILD_TEST_BUILD_PIPELINE=test/build-from-yum.json" test/run
+        - sudo env "PATH=$PATH" "OSBUILD_TEST_BUILD_PIPELINE=test/build-from-yum.json" test/run --image-info
+    # I know this looks stupid, but it actually enables the tests to run in parallel, so it takes less time
+    - language: python
+      python: 3.7
+      env: PYTHONUNBUFFERED=1
+      before_install: sudo apt-get install -y qemu-kvm
+      script:
+        # ubuntu's rpm package sets dbpath to ~/.rpmdb, which makes rpm fail...
+        - sudo sh -c 'mkdir /etc/rpm; echo "%_dbpath /var/lib/rpm" > /etc/rpm/macros'
+        - sudo env "PATH=$PATH" "OSBUILD_TEST_BUILD_PIPELINE=test/build-from-yum.json" test/run --boot-test