[EAGLE-924] urls to healthy and unhealthy region-servers in hbase dashboard is not accurate enough

[EAGLE-924]urls to healthy and unhealthy region-servers in hbase dashboard is not accurate enough

- Add status filter in web url,append "?status=healthy" or "?status=unhealthy" to the url
- Fix exception when we change time interval
- Fix dashboard show when no data and exception.

https://issues.apache.org/jira/browse/EAGLE-924

Author: chitin <chitin1027@gmail.com>

Closes #840 from chitin/eagle924.
13 files changed