communicators/ssh: change wording on retry

CHANGELOG.md

@@ -3,6 +3,8 @@
 IMPROVEMENTS:
 
   - **New guest:** SmartOS
+  - core: Change wording from "error" to "warning" on SSH retry output
+    to convey actual meaning.
   - guests/omnios: Mount NFS capability [GH-3282]
 
 BUG FIXES:

plugins/communicators/ssh/communicator.rb

@@ -83,7 +83,7 @@ module VagrantPlugins
             end
 
             if message
-              @machine.ui.detail("Error: #{message} Retrying...")
+              @machine.ui.detail("Warning: #{message} Retrying...")
             end
           end
         end