ID 137310 - ColorMatrix node should default to identity not all 0.

Problem summary
ColorMatrix node should default to identity not all 0.

Customer reported version
nuke.10.0v4

Customer reported platform
centos6

Steps to reproduce
1. Open Nuke
2. Read in footage
3. Create ColorMatrix node
4. View ColorMatrix node
Result: viewer displays black because the ColorMatrix default values are 0

Workaround
set nuke.knobDefault("ColorMatrix.matrix","{1 0 0} {0 1 0} {0 0 1}") 

Reproduced by support
Nuke 10.5v3 - OSX 10.11.6

Expected behaviour
ColorMatrix knob to default to {1 0 0} {0 1 0} {0 0 1}

Actual behaviour
ColorMatrix knob defaults to {0 0 0} {0 0 0} {0 0 0}