[xwalkdriver] Bind tizenDebuggerAddress to acquire specific device

Bind tizenDebuggerAddress of capabilities to launch specific tizen
device. And add check the status of running tizen app before launch,
kill the app if necessary.

BUG=https://crosswalk-project.org/jira/browse/XWALK-3009
Merge pull request #7 from wuyuehang/xwalk-3009

[xwalkdriver] Bind tizenDebuggerAddress to acquire specific device