Merge pull request #1176 from CakeDC/fix/random-string-trait #883

Job	Run time
Coding Standard & Static Analysis	43s
testsuite (8.3, sqlite)	46s
testsuite (8.2, pgsql)	1m 11s
testsuite (8.2, sqlite)	59s
testsuite (8.3, pgsql)	56s
testsuite (8.3, mysql)	44s
testsuite (8.5, sqlite)	1m 3s
testsuite (8.4, sqlite)	1m 0s
testsuite (8.4, mysql)	1m 13s
testsuite (8.2, mysql)	1m 24s
testsuite (8.4, pgsql)	1m 0s
testsuite (8.5, pgsql)	1m 9s
testsuite (8.5, mysql)	1m 16s
	13m 24s

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