Inconsistent error messages for segment host show

[Hussain Chachuliya]

There is inconsistency in error messages that is displayed to the user via masakari-client and the one displayed in masakari-api service logs.
If user passes non-existing segment id to the "host show" command, then user should get proper error message saying "No failover segment with id <id>" instead of "Host not found: <hostname>" as it might confuse user if host name passed to the command is really existing.

Steps to reproduce:
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1. Execute segment host show command with a non-existing segment ID.

* From masakari-client:
$ openstack segment host show abc abb
Host not found: abb

* From masakari-api service logs:
2017-01-03 12:19:22.780 INFO masakari.api.openstack.wsgi [req-8f3f63a4-3b85-4508-bcf1-57c722e4af5a dbf0c5f0b24d4514824c29ded436bbd5 b3fb75ec568f4e719f8e12b818227a5b] HTTP exception thrown: No failover segment with id abc.

Expected output:
----------------
$ openstack segment host show abc abb
No failover segment with id abc.

[Tushar Patil (tpatil)]

If user passes non-existing segment id to the "host show" command, then user should get proper error message saying "no failover segment with id <id>" instead of "host not found: <hostname>" as it might confuse user if host name passed to the command is really existing.

[Rohanil Raje (rohanil)]

This is what I got on masakariclient:

$ openstack segment host show abc abb
NotFoundException: Not Found, No failover segment with id abc.

I think it is returning correct error message now. So looks fixed.
I am using commit: d875c0206f3b3987f05c85b273abd447f6203a79