Improve github workflow

Author: splasky

.github/workflows/python-ci.yaml

@@ -10,6 +10,11 @@ on:
 jobs:
   build:
     runs-on: ubuntu-latest
+    
+    env:
+      PATH: "/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/opt/google-cloud-sdk/bin"
+      GCLOUD_PATH: "/opt/google-cloud-sdk/bin"
+      DATASTORE_EMULATOR_HOST: "localhost:8081"
 
     steps:
     - name: Checkout code