Remove default admin credentials in security test workflow (#616)

Signed-off-by: Ryan Bogan <rbogan@amazon.com>
(cherry picked from commit 7c214dc)

Author: ryanbogan

.github/workflows/test_security.yml

@@ -72,17 +72,17 @@ jobs:
         if: env.imagePresent == 'true'
         run: |
           cd ..
-          docker run -p 9200:9200 -d -p 9600:9600 -e "discovery.type=single-node" opensearch-geospatial:test
+          docker run -p 9200:9200 -d -p 9600:9600 -e "OPENSEARCH_INITIAL_ADMIN_PASSWORD=myStrongPassword123!" -e "discovery.type=single-node" opensearch-geospatial:test
           sleep 90
 
       - name: Run Geospatial Integ Test
         if: env.imagePresent == 'true'
         run: |
-          security=`curl -XGET https://localhost:9200/_cat/plugins?v -u admin:admin --insecure |grep opensearch-security|wc -l`
+          security=`curl -XGET https://localhost:9200/_cat/plugins?v -u admin:myStrongPassword123! --insecure |grep opensearch-security|wc -l`
           if [ $security -gt 0 ]
           then
             echo "Security plugin is available"
-            ./gradlew integTest -Dtests.rest.cluster=localhost:9200 -Dtests.cluster=localhost:9200 -Dtests.clustername="docker-cluster" -Dhttps=true -Duser=admin -Dpassword=admin
+            ./gradlew integTest -Dtests.rest.cluster=localhost:9200 -Dtests.cluster=localhost:9200 -Dtests.clustername="docker-cluster" -Dhttps=true -Duser=admin -Dpassword=myStrongPassword123!
           else
             echo "Security plugin is NOT available, skipping integration tests"
           fi