Fix "Test_SUM_Queue" unit-test #612

Job	Run time
test (NOLOOP=1)	27m 4s
test (NOLOOP=1)	27m 4s
test (NOLOOP=1)	25m 41s
test (NOLOOP=1)	26m 3s
test (NOLOOP=1)	31m 23s
test (NOLOOP=1 TEST_PATTERNS=sall)	26m 48s
test (NOLOOP=1 TEST_PATTERNS=sall)	43m 3s
test (NOLOOP=1 TEST_PATTERNS=sall)	43m 3s
test (NOLOOP=1 TEST_PATTERNS=sall)	43m 3s
test (NOLOOP=1 TEST_PATTERNS=sall)	43m 3s
	5h 36m 15s

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