Reduce max subs from 10 to 5 and limit kain to run for maxsubs iterat… #1512

Job	Run time
macos-latest: clang++ Release Threads	14m 46s
macos-latest: clang++ Release OneTBB	3m 22s
macos-latest: clang++ Release PaRSEC	3m 39s
ubuntu-20.04: /usr/bin/g++-9 Release Threads	25m 20s
ubuntu-20.04: /usr/bin/g++-9 Release OneTBB	2m 14s
ubuntu-20.04: /usr/bin/g++-9 Release PaRSEC	3m 1s
macos-latest: clang++ Debug Threads	14m 42s
macos-latest: clang++ Debug OneTBB	3m 33s
macos-latest: clang++ Debug PaRSEC	3m 59s
ubuntu-20.04: /usr/bin/g++-9 Debug Threads	29m 27s
ubuntu-20.04: /usr/bin/g++-9 Debug OneTBB	1m 39s
ubuntu-20.04: /usr/bin/g++-9 Debug PaRSEC	2m 58s
	1h 48m 40s

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