Add multiprocess travis configuration

Author: ryanofsky

.travis.yml

@@ -181,6 +181,16 @@ jobs:
         GOAL="install"
         BITCOIN_CONFIG="--enable-fuzz --with-sanitizers=fuzzer,address CC=clang CXX=clang++"
 
+    - stage: test
+      name: 'x86_64 Linux [GOAL: install]  [bionic]  [multiprocess]'
+      env: >-
+        HOST=x86_64-unknown-linux-gnu
+        PACKAGES="cmake python3"
+        DEP_OPTS="MULTIPROCESS=1"
+        GOAL="install"
+        BITCOIN_CONFIG=""
+        TEST_RUNNER_ENV="BITCOIND=bitcoin-node"
+
     - stage: test
       name: 'x86_64 Linux  [GOAL: install]  [bionic]  [no wallet]'
       env: >-

.travis/test_06_script_b.sh

@@ -16,7 +16,7 @@ fi
 
 if [ "$RUN_FUNCTIONAL_TESTS" = "true" ]; then
   BEGIN_FOLD functional-tests
-  DOCKER_EXEC LD_LIBRARY_PATH=$TRAVIS_BUILD_DIR/depends/$HOST/lib test/functional/test_runner.py --ci --combinedlogslen=4000 ${TEST_RUNNER_EXTRA} --quiet --failfast
+  DOCKER_EXEC LD_LIBRARY_PATH=$TRAVIS_BUILD_DIR/depends/$HOST/lib ${TEST_RUNNER_ENV} test/functional/test_runner.py --ci --combinedlogslen=4000 ${TEST_RUNNER_EXTRA} --quiet --failfast
   END_FOLD
 fi