test_object_map: Use ASSERT_EQ() for check() so failure doesn't stop testing

Signed-off-by: David Zafman <dzafman@redhat.com>

src/test/ObjectMap/test_object_map.cc

@@ -542,7 +542,7 @@ public:
 
   void TearDown() override {
     std::cerr << "Checking..." << std::endl;
-    assert(db->check(std::cerr) == 0);
+    ASSERT_EQ(0, db->check(std::cerr));
   }
 };