Light blocker doesn't work in render delegate

[xsisupport]

Describe the bug
A light blocker that worked with Arnold 7.2.5.2 does not work with Arnold 7.3.1

To Reproduce
Load the attached usd file into Houdini and render. No light blocker.
If you kick the usd file, you get the light blocker.
The debug ass file for the Solaris viewport render shows that the light blocker is not connected to the light.

Simpler setups do work though, so it's something about how this scene is set up.

blocker_regression.zip

[autodesk-oss-arnold-bot]

Issue synced internally to ARNOLD-15019

[cpichard]

I can only reproduce this issue with a cmake build of the render delegate. It seems like the plugInfo.json files are incorrect, the libraries they are pointing too have quotes and are not readable by usd.

[cpichard]

I finally managed to reproduce the issue with houdini. The primvar primvars:arnold:shaders sets the light filters to the correct node, howeverprimvars:arnold:filters which overrides the node filters is set to an empty array and clears the value previously set by primvars:arnold:shaders. primvars:arnold:filters is defered to the ProcessConnection function which happens once all the nodes parameters are set.