mod_md pytest: fix run on a clean test/gen to create #1145

Job	Run time
Empty APLOGNO() test	29s
Default	3m 35s
All-static modules	3m 40s
Prefork MPM, all-modules (except cgid)	4m 12s
Worker MPM, all-modules	4m 17s
Shared MPMs, all-modules	4m 31s
Event MPM, all-modules, mod_cgid only	4m 7s
Event MPM, all-modules, no CMSG_DATA	4m 31s
Default, all-modules + install	4m 44s
Default, all-modules, random test order	4m 14s
GCC 10 maintainer-mode w/-Werror, install + VPATH	3m 17s
All-modules, APR 1.7.4, APR-util 1.6.3	4m 10s
APR 1.8.x, APR-util 1.7.x	5m 55s
Pool-debug	5m 57s
Shared MPMs (event), pool-debug, SSL/TLS variants	9m 59s
Shared MPMs (worker), pool-debug, SSL/TLS variants	11m 7s
Shared MPMs (prefork), pool-debug, SSL/TLS variants	10m 40s
litmus WebDAV tests	2m 36s
litmus WebDAV tests, APR trunk, LMDB	2m 54s
Regenerate ap_expr	4m 1s
APR 1.7.4, APR-util 1.6.3, LDAP	3m 57s
APR 1.7.x, APR-util 1.7.x, LDAP	6m 16s
APR trunk thread debugging	4m 36s
UBSan	5m 12s
ASan	6m 42s
ASan, pool-debug	7m 5s
HTTP/2 test suite	5m 11s
Configured w/reduced exports	2m 0s
OpenSSL 3.1	3m 34s
OpenSSL 3.2 -Werror	4m 18s
OpenSSL 3.2 no-engine	3m 32s
OpenSSL 3.3 no-engine -Werror	4m 6s
	2h 35m 25s

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