Fix device_manager ut

previously we have use-after-release as during restart HS
all chunk are released. But after restart we dont refresh our
vdev vector which still refering to old chunks.

Signed-off-by: Xiaoxi Chen <[email protected]>

src/tests/test_device_manager.cpp

@@ -80,6 +80,7 @@ class DeviceMgrTest : public ::testing::Test {
             });
         m_dmgr->is_first_time_boot() ? m_dmgr->format_devices() : m_dmgr->load_devices();
         m_pdevs = m_dmgr->get_pdevs_by_dev_type(homestore::HSDevType::Data);
+        m_vdevs = m_dmgr->get_vdevs();
     }
 
     void restart() {