Fix IE detection middleware to not fail tests
Fix IE detection middleware to not fail tests

Test client does not specify HTTP_USER_AGENT.

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