[systemtest] Add test timeout

Time out tests; if tests time out, all existing logs are dumped, helping
to debug.

Signed-off-by: Philipp Wagner <phw@lowrisc.org>
diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index b7d9893..01ef05c 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -219,6 +219,7 @@
   - bash: |
       . util/build_consts.sh
       export VERILATED_SYSTEM_PATH="$BIN_DIR/hw/top_earlgrey/Vtop_earlgrey_verilator"
+      pytest --version
       ci/run_verilator_pytest.sh
     displayName: 'Execute tests'