Add missing space in the message produced by @log

Fixes bug: #1211275

Change-Id: I06140058cd4e0819cc9e8879516e54f67f54836d
Fix resource status in NEC Plugin

This commit makes sure that the plugin exposes right status in a
response body, and does not overwrite ERROR status until another
operation to the backend has succeeded.

This commit also changes NEC Plguin to use neutron constants instead of
OperationalStatus defined in this plugin.

Fixes: bug #1211319
Change-Id: Ic61b8e1b9d3f6c2be9567dd5a4606aa6d439c564
Merge "Fix resource status in NEC Plugin"
Merge "Add missing space in the message produced by @log"