Allow deleting users. Fixes #117
Allow deleting users. Fixes #117

The audit framework assumed that auditable objects have an 'instance'
param, which is not always the case.

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