framework/output_processor: fix get_output_processor()
framework/output_processor: fix get_output_processor()

Output processor names are converted to identifiers when they are
loaded. Ensure the same thing happens when looking up installed output
processors with get_output_processor().

lisatn/workload-automation,setrofim/workload-automation,setrofim/workload-automation,lisatn/workload-automation,ARM-software/workload-automation,ARM-software/workload-automation,setrofim/workload-automation,lisatn/workload-automation,lisatn/workload-automation,ARM-software/workload-automation,setrofim/workload-automation,ARM-software/workload-automation