Add an option to force users to use the first and last name as pad login

This commit is dedicated to Schoumi, who is supporting me on Tipeee.
Many thanks :-)
5 jobs from useDisplayNameInPads in 34 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Test
passed #111295
test_node_4

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passed #111296
test_node_6

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passed #111297
test_node_8

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passed #111298
test_node_9

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passed #111294
test_node_latest

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