Apply clang-format for more source files (#795)

Apply clang-format for C source files in folder core/app-mgr,
core/app-framework, and test-tools.
And rename folder component_test to component-test, update
zephyr build document.

Signed-off-by: Wenyong Huang <wenyong.huang@intel.com>

test-tools/component-test/framework/engine.py

@@ -0,0 +1,38 @@
+#
+# Copyright (C) 2019 Intel Corporation.  All rights reserved.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+#
+
+import datetime
+import os
+import pprint
+import random
+import re
+import shlex
+import subprocess
+import signal
+import sys
+import time
+
+from .test_utils  import *
+from .test_api import *
+
+
+
+
+def read_cases_from_file(file_path):
+    if not os.path.exists(file_path):
+        return False, None
+
+    with open(file_path, 'r') as f:
+        content = f.readlines()
+
+    content = [x.strip() for x in content]
+    print content
+    if len(content) == 0:
+        return False, None
+
+    return True, content
+
+
+