ci: Set increased --timeout-factor by default

ci/test/00_setup_env.sh

@@ -35,6 +35,10 @@ export USE_BUSY_BOX=${USE_BUSY_BOX:-false}
 export RUN_UNIT_TESTS=${RUN_UNIT_TESTS:-true}
 export RUN_FUNCTIONAL_TESTS=${RUN_FUNCTIONAL_TESTS:-true}
 export RUN_SECURITY_TESTS=${RUN_SECURITY_TESTS:-false}
+# By how much to scale the test_runner timeouts (option --timeout-factor).
+# This is needed because some ci machines have slow CPU or disk, so sanitizers
+# might be slow or a reindex might be waiting on disk IO.
+export TEST_RUNNER_TIMEOUT_FACTOR=${TEST_RUNNER_TIMEOUT_FACTOR:-4}
 export TEST_RUNNER_ENV=${TEST_RUNNER_ENV:-}
 export RUN_FUZZ_TESTS=${RUN_FUZZ_TESTS:-false}
 export EXPECTED_TESTS_DURATION_IN_SECONDS=${EXPECTED_TESTS_DURATION_IN_SECONDS:-1000}