Fix plot recent audit filter
Fix plot recent audit filter

The method which fetched plot audits was not including the plot id in
the filter, so audits for other plots were showing up on the plot
detail page.

Fixes #613

clever-crow-consulting/otm-core,clever-crow-consulting/otm-core,RickMohr/otm-core,clever-crow-consulting/otm-core,recklessromeo/otm-core,recklessromeo/otm-core,RickMohr/otm-core,recklessromeo/otm-core,clever-crow-consulting/otm-core,maurizi/otm-core,maurizi/otm-core,RickMohr/otm-core,RickMohr/otm-core,maurizi/otm-core,recklessromeo/otm-core,maurizi/otm-core