Use ipa-docker-test-runner to run tests in Travis CI

https://github.com/martbab/ipa-docker-test-runner is now used to run the
following tasks in Travis CI:

* pull in a FreeIPA test runner Docker image
* configure/make lint/make rpms
* install rpms
* install FreeIPA server and KRA
* run out-of-tree tests

For performance reasons (last two steps are very time-consuming) the available
tests were split roughly in half and are run as two separate jobs to speed up
the process.

AD trust is not installed as part of tests since the enabled compat plugin
causes false negative errors.

Reviewed-By: Stanislav Laznicka <slaznick@redhat.com>
Reviewed-By: Christian Heimes <cheimes@redhat.com>

.travis.yml

@@ -1,16 +1,44 @@
 services:
     - docker
 
+env:
+    global:
+        - TEST_RUNNER_IMAGE="martbab/freeipa-fedora-test-runner:master-latest"
+    matrix:
+        - TESTS_TO_RUN="test_xmlrpc/test_[a-k]*.py"
+        - >
+            TESTS_TO_RUN="test_cmdline
+            test_install
+            test_ipalib
+            test_ipapython
+            test_ipaserver
+            test_pkcs10
+            test_xmlrpc/test_[l-z]*.py"
 before_install:
     - pip install pep8
+    - >
+      pip3 install
+      git+https://github.com/freeipa/ipa-docker-test-runner@release-0-2-0
 
 script:
     - >
         if [[ "$TRAVIS_EVENT_TYPE" == "pull_request" ]];
         then
-            git diff origin/${TRAVIS_BRANCH} -U0 | pep8 --diff;
+            git diff origin/${TRAVIS_BRANCH} -U0 | pep8 --diff &> pep8_errors.log;
         fi
+    - "pushd ipatests; test_set=`ls -d -1 $TESTS_TO_RUN 2> /dev/null`; popd"
+    # use travis_wait so that long running tasks (tests) which produce no
+    # output do not cause premature termination of the build
+    - "docker pull ${TEST_RUNNER_IMAGE}"
     - >
-        docker run -v $PWD:/freeipa -w /freeipa
-        martbab/freeipa-fedora-builder:${TRAVIS_BRANCH}-latest
-        /bin/bash -c 'dnf builddep -y -D "with_lint 1" --spec freeipa.spec.in && autoreconf -i && ./configure && make lint && make rpms'
+        travis_wait 50
+        ipa-docker-test-runner -l ci_results_${TRAVIS_BRANCH}.log
+        -c .test_runner_config.yaml
+        --container-image ${TEST_RUNNER_IMAGE}
+        --git-repo ${TRAVIS_BUILD_DIR}
+        run-tests $test_set
+after_failure:
+  - echo "Test runner output:"
+  - tail -n 5000 ci_results_${TRAVIS_BRANCH}.log
+  - echo "PEP-8 errors:"
+  - cat pep8_errors.log