Add support for nextcloud master #1814

Job	Run time
builds / unit tests and linting (stable30, 8.1)	1m 58s
builds / unit tests and linting (stable30, 8.2)	2m 5s
builds / API tests (stable30, 8, 1, mysql)	15m 7s
builds / unit tests and linting (stable30, 8.3)	2m 0s
builds / unit tests and linting (master, 8.1)	2m 32s
builds / API tests (stable30, 8, 2, mysql)	16m 10s
builds / unit tests and linting (master, 8.2)	2m 8s
builds / API tests (stable30, 8, 3, mysql)	14m 13s
builds / unit tests and linting (master, 8.3)	2m 37s
builds / API tests (stable30, 8, 1, pgsql)	16m 2s
builds / unit tests and linting (stable27, 8)	2m 6s
builds / API tests (stable27, 8, 0, mysql)	15m 27s
builds / unit tests and linting (stable28, 8.1)	2m 11s
builds / API tests (stable28, 8, 1, mysql)	15m 15s
builds / unit tests and linting (stable29, 8.1)	4m 18s
builds / API tests (stable29, 8, 1, mysql)	15m 8s
builds / API tests (master, 8, 3, mysql)	14m 21s
builds / notify-nightly-report	0s
	2h 23m 38s

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