infra: skip integ tests in PR build if only unit tests are modified (#1423)

Author: laurenyu

buildspec-localmodetests.yml

@@ -11,5 +11,5 @@ phases:
 
       # local mode tests
       - start_time=`date +%s`
-      - execute-command-if-has-matching-changes "tox -e py27,py36 -- tests/integ -m local_mode --durations 50" "tests/" "src/*.py" "setup.py" "setup.cfg" "buildspec-localmodetests.yml"
+      - execute-command-if-has-matching-changes "tox -e py27,py36 -- tests/integ -m local_mode --durations 50" "tests/integ" "tests/data" "tests/conftest.py" "tests/__init__.py" "src/*.py" "setup.py" "setup.cfg" "buildspec-localmodetests.yml"
       - ./ci-scripts/displaytime.sh 'py27,py36 local mode' $start_time

buildspec.yml

@@ -11,12 +11,12 @@ phases:
 
       # run integration tests
       - start_time=`date +%s`
-      - execute-command-if-has-matching-changes "python3 -u ci-scripts/queue_build.py" "tests/" "src/*.py" "setup.py" "setup.cfg" "buildspec.yml"
+      - execute-command-if-has-matching-changes "python3 -u ci-scripts/queue_build.py" "tests/integ" "tests/scripts" "tests/data" "tests/conftest.py" "tests/__init__.py" "src/*.py" "setup.py" "setup.cfg" "buildspec.yml"
       - ./ci-scripts/displaytime.sh 'build queue' $start_time
 
       - start_time=`date +%s`
       - |
-        execute-command-if-has-matching-changes "env -u AWS_DEFAULT_REGION tox -e py36 -- tests/integ -m \"not local_mode\" -n 512 --reruns 3 --reruns-delay 5 --durations 50 --boto-config '{\"region_name\": \"us-east-2\"}'" "tests/" "src/*.py" "setup.py" "setup.cfg" "buildspec.yml"
+        execute-command-if-has-matching-changes "env -u AWS_DEFAULT_REGION tox -e py36 -- tests/integ -m \"not local_mode\" -n 512 --reruns 3 --reruns-delay 5 --durations 50 --boto-config '{\"region_name\": \"us-east-2\"}'" "tests/integ" "tests/scripts" "tests/data" "tests/conftest.py" "tests/__init__.py" "src/*.py" "setup.py" "setup.cfg" "buildspec.yml"
       - ./ci-scripts/displaytime.sh 'py36 tests/integ' $start_time
 
   post_build: