Extend example_timeout_second in all_example_test

Author: CongkeChen

pipeline_test/run_all_examples.sh

@@ -11,7 +11,7 @@ REPO_ROOT="$(cd "${SCRIPT_DIR}/.." && pwd)"
 RUN_MODE="all"
 FAIL_FAST=false
 INCLUDE_MANUAL=false
-EXAMPLE_TIMEOUT_SECONDS="${EXAMPLE_TIMEOUT_SECONDS:-300}"
+EXAMPLE_TIMEOUT_SECONDS="${EXAMPLE_TIMEOUT_SECONDS:-500}"
 
 PASSED=()
 FAILED=()