Merge branch 'var-update' into 'master'

update: Updated GC_INTEGRATION_TESTER to File

See merge request !544

app/tests/gc/run-integration-tests.sh

@@ -3,8 +3,7 @@ set -e
 # move to the root of the repo
 cd $CI_PROJECT_DIR
 #auth steps
-echo $GC_INTEGRATION_TESTER | base64 -d > GC_INTEGRATION_TESTER.json
-export GOOGLE_APPLICATION_CREDENTIALS="$CI_PROJECT_DIR/GC_INTEGRATION_TESTER.json"
+export GOOGLE_APPLICATION_CREDENTIALS="$GC_INTEGRATION_TESTER_SA_FILE"
 curl https://community.opengroup.org/api/v4/projects/1410/packages/generic/gc_auth_token/master/gc_auth_token -o gc_auth_token
 chmod +x gc_auth_token
 export BEARER_TOKEN=$(./gc_auth_token)