CI: parallelize integration test

I'm not sure whether 'make inttest' should do this or not

.appveyor.yml

@@ -27,4 +27,6 @@ build_script:
     - c:\cygwin-root\bin\sh -lc "rebase -s -v $(cat /tmp/files-to-rebase)"
 test_script:
     - c:\cygwin-root\bin\sh -lc "cd $APPVEYOR_BUILD_FOLDER/build; make VERBOSE=1 unittest < /dev/null"
-    - c:\cygwin-root\bin\sh -lc "cd $APPVEYOR_BUILD_FOLDER/build; env ZNC_QT_VER=5 make VERBOSE=1 inttest < /dev/null"
+    - c:\cygwin-root\bin\sh -lc "cd $APPVEYOR_BUILD_FOLDER/build; env ZNC_QT_VER=5 make VERBOSE=1 inttest_bin < /dev/null"
+    - c:\cygwin-root\bin\sh -lc "cd $APPVEYOR_BUILD_FOLDER/build; git clone --depth=1 https://github.com/google/gtest-parallel"
+    - c:\cygwin-root\bin\sh -lc "cd $APPVEYOR_BUILD_FOLDER/build; gtest-parallel/gtest-parallel test/integration/inttest"

.github/build.sh

@@ -31,8 +31,11 @@ env LLVM_PROFILE_FILE="$PWD/unittest.profraw" make VERBOSE=1 unittest
 sudo make install
 /usr/local/bin/znc --version
 
+git clone --depth=1 https://github.com/google/gtest-parallel
+make VERBOSE=1 inttest_bin
+
 # TODO: use DEVEL_COVER_OPTIONS for https://metacpan.org/pod/Devel::Cover
-env LLVM_PROFILE_FILE="$PWD/inttest.profraw" ZNC_MODPERL_COVERAGE_OPTS="-db,$PWD/cover_db" PYTHONWARNINGS=error make VERBOSE=1 inttest
+env LLVM_PROFILE_FILE="$PWD/inttest.profraw" ZNC_MODPERL_COVERAGE_OPTS="-db,$PWD/cover_db" PYTHONWARNINGS=error gtest-parallel/gtest-parallel test/integration/inttest
 ls -lRa
 
 ~/perl5/bin/cover --no-gcov --report=clover

Jenkinsfile

@@ -26,7 +26,9 @@ timestamps {
         stage('Integration test') {
           withEnv(['GTEST_OUTPUT=xml:integration-test.xml']) {
             sh 'make install'
-            sh 'make inttest'
+            sh 'make inttest_bin'
+            sh 'git clone --depth=1 https://github.com/google/gtest-parallel'
+            sh 'gtest-parallel/gtest-parallel test/integration/inttest'
           }
         }
         junit '**/*test.xml'