chore: fix pytest version in integration test (#60)

Co-authored-by: xiaoweii <xiaoweii@amazom.com>

Author: zhu-xiaowei

.github/workflows/integration_test.yml

@@ -58,8 +58,7 @@ jobs:
           virtualenv workspace
           cd workspace
           source bin/activate
-          pip install pytest
-          pip install Appium-Python-Client
+          pip install -r ../requirements.txt
           mkdir tests
           cp ../appium/shopping_test.py tests/
           find tests/
@@ -108,4 +107,4 @@ jobs:
           name: test-result
           path: |
             integrationtest/devicefarm/report/
-            integrationtest/devicefarm/MyAndroidAppTest-*/**
+            integrationtest/devicefarm/MyAndroidAppTest-*/**