fix db name.

Author: galiacheng

.github/workflows/testWlsAksWithoutDependencyCreation.yml

@@ -232,7 +232,7 @@ jobs:
                   ${{ needs.preflight.outputs.testBranchNameForArtifactsLocation }} \
                   "${cargoTrackerBlobUrl}" \
                   ${dbPassword} \
-                  ${dbAdminUser}@${{ needs.preflight.outputs.dbName }} \
+                  ${dbAdminUser} \
                   jdbc:postgresql:\/\/${{ needs.preflight.outputs.dbName }}.postgres.database.azure.com:5432\/postgres \
                   ${location} \
                   ${ocrSSOPSW} \