Disable unit test parallel execution for Jenkins (#661)

* Add tox.ini changes

* Remove parallel options from Jenkins script

* Apply suggestions from code review

Co-authored-by: Mark Keller <63477823+sfc-gh-mkeller@users.noreply.github.com>

* Update tox.ini

Co-authored-by: Mark Keller <63477823+sfc-gh-mkeller@users.noreply.github.com>

.github/workflows/build_test.yml

@@ -254,7 +254,7 @@ jobs:
       - name: Install tox
         run: python -m pip install tox tox-external-wheels
       - name: Run tests
-        run: python -m tox -e "py${PYTHON_VERSION/\./}-{extras,unit,integ,pandas,sso}-ci"
+        run: python -m tox -e "py${PYTHON_VERSION/\./}-{extras,unit-parallel,integ,pandas,sso}-ci"
         env:
           PYTHON_VERSION: ${{ matrix.python-version }}
           cloud_provider: ${{ matrix.cloud-provider }}

tox.ini

@@ -18,7 +18,7 @@ source = src/snowflake/connector
 [tox]
 minversion = 3.7
 envlist = fix_lint,
-          py{36,37,38,39}-{extras,unit,integ,pandas,sso},
+          py{36,37,38,39}-{extras,unit-parallel,integ,pandas,sso},
           coverage
 skip_missing_interpreters = true
 requires =
@@ -46,8 +46,8 @@ setenv =
     unit-integ: SNOWFLAKE_TEST_TYPE = (unit or integ)
     !unit-!integ: SNOWFLAKE_TEST_TYPE = (unit or integ)
     unit: SNOWFLAKE_TEST_TYPE = unit
-    unit: SNOWFLAKE_PYTEST_OPTS = {env:SNOWFLAKE_PYTEST_OPTS:} -n auto
     integ: SNOWFLAKE_TEST_TYPE = integ
+    parallel: SNOWFLAKE_PYTEST_OPTS = {env:SNOWFLAKE_PYTEST_OPTS:} -n auto
     # Add common parts into pytest command
     SNOWFLAKE_PYTEST_COV_LOCATION = {env:JUNIT_REPORT_DIR:{toxworkdir}}/junit.{envname}-{env:cloud_provider:dev}.xml
     SNOWFLAKE_PYTEST_COV_CMD = --cov snowflake.connector --junitxml {env:SNOWFLAKE_PYTEST_COV_LOCATION} --cov-report=