log state dir

On the log output, clearly show which state dir is used. Since all runs should
use the same state dir, this is important and/or reassuring to see.

Change-Id: Ie92f1879a35d8bb399ee916b7ef72f9ee7d47409
diff --git a/src/osmo_gsm_tester/suite.py b/src/osmo_gsm_tester/suite.py
index affb9ad..43e55af 100644
--- a/src/osmo_gsm_tester/suite.py
+++ b/src/osmo_gsm_tester/suite.py
@@ -186,7 +186,7 @@
     def reserve_resources(self):
         if self.reserved_resources:
             raise RuntimeError('Attempt to reserve resources twice for a SuiteRun')
-        self.log('reserving resources...')
+        self.log('reserving resources in', self.resources_pool.state_dir, '...')
         with self:
             self.reserved_resources = self.resources_pool.reserve(self, self.resource_requirements())