Remove character filtering from V3 API console_output

Removes the character filtering from the V3 API console_output
extension as this was implemented because of a bug in the xml
library where some characters were not escaped correctly. We no
longer need to do this as we no longer support XML.

Partially implements bp remove-v3-xml-api

Change-Id: Id1501143eca17084d4079777a3c6f8c7157fbac7
Merge "Remove character filtering from V3 API console_output"