add escalator frame

JIRA:ESCALATOR-35

This patch will support escalator service,and there is not real command can use.
With this code, you can test with '/usr/bin/escalator-api' from command line.When
service is up, you can use "curl http://127.0.0.1:19393" for verify the service.

Change-Id: I5154328adf82ec70acb6e0ce12ef4b1701f7b710
Signed-off-by: Jing Sun <sun.jing22@zte.com.cn>