Abort 'vcl_init' asap if a VMOD object instance cannot be created. Se… #310

Job	Run time
test (redis, gcc, check)	7m 12s
test (redis, gcc, distcheck)	7m 22s
test (redis, clang, check)	7m 7s
test (redis, clang, distcheck)	7m 14s
test (valkey, gcc, check)	7m 19s
test (valkey, gcc, distcheck)	7m 24s
test (valkey, clang, check)	7m 13s
test (valkey, clang, distcheck)	7m 23s
test (redis, gcc, lcov, --enable-code-coverage)	7m 24s
	1h 5m 38s

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