Add OneTimetokenAuthenticator as part of the magic link feature #195

Job	Run time
testsuite (8.1, sqlite)	14s
Coding Standard & Static Analysis	22s
testsuite (8.1, mysql)	21s
testsuite (8.1, pgsql)	20s
testsuite (8.2, sqlite)	16s
testsuite (8.2, mysql)	24s
testsuite (8.2, pgsql)	21s
testsuite (8.3, sqlite)	18s
testsuite (8.3, mysql)	21s
testsuite (8.3, pgsql)	19s
testsuite (8.4, sqlite)	21s
testsuite (8.4, mysql)	20s
testsuite (8.4, pgsql)	30s
	4m 27s

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